diff --git a/Dockerfile.multiarch b/Dockerfile.multiarch
new file mode 100644
index 0000000..ccb9239
--- /dev/null
+++ b/Dockerfile.multiarch
@@ -0,0 +1,77 @@
+# HMAC File Server 3.3.0 "Nexus Infinitum" - Multi-Architecture Dockerfile
+# Supports: AMD64, ARM64, ARM32v7
+
+FROM --platform=$BUILDPLATFORM golang:1.24-alpine AS builder
+
+# Build arguments for cross-compilation
+ARG TARGETOS
+ARG TARGETARCH
+ARG TARGETVARIANT
+
+WORKDIR /build
+
+# Install build dependencies
+RUN apk add --no-cache git ca-certificates tzdata
+
+# Copy Go modules first for better caching
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Copy source code
+COPY . .
+
+# Build binary with cross-compilation support
+RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} \
+    go build -ldflags="-w -s -X main.version=3.3.0" \
+    -a -installsuffix cgo \
+    -o hmac-file-server ./cmd/server/
+
+# Production stage - Multi-arch Alpine
+FROM --platform=$TARGETPLATFORM alpine:latest
+
+# Install runtime dependencies
+RUN apk add --no-cache \
+    ca-certificates \
+    tzdata \
+    curl \
+    shadow
+
+# Create non-root user for security
+RUN adduser -D -s /bin/sh -u 1011 appuser
+
+# Create application directories
+RUN mkdir -p /opt/hmac-file-server/{data/{uploads,duplicates,temp,logs},config} \
+    && chown -R appuser:appuser /opt/hmac-file-server \
+    && chmod 750 /opt/hmac-file-server/data/{uploads,duplicates,temp,logs}
+
+WORKDIR /opt/hmac-file-server
+
+# Copy binary from builder stage
+COPY --from=builder /build/hmac-file-server /usr/local/bin/hmac-file-server
+RUN chmod +x /usr/local/bin/hmac-file-server
+
+# Copy configuration templates
+COPY templates/config-docker.toml /opt/hmac-file-server/config/config.toml.example
+
+# Switch to non-root user
+USER appuser
+
+# Expose ports
+EXPOSE 8080 8888
+
+# Health check that works across architectures
+HEALTHCHECK --interval=30s --timeout=15s --start-period=60s --retries=3 \
+    CMD curl -f http://localhost:8888/health || exit 1
+
+# Add multi-arch labels
+LABEL org.opencontainers.image.title="HMAC File Server" \
+      org.opencontainers.image.description="Secure multi-architecture file server with XEP-0363 support" \
+      org.opencontainers.image.version="3.3.0" \
+      org.opencontainers.image.vendor="UUXO" \
+      org.opencontainers.image.source="https://git.uuxo.net/uuxo/hmac-file-server/" \
+      org.opencontainers.image.licenses="MIT" \
+      org.opencontainers.image.architecture="multi"
+
+# Entry point
+ENTRYPOINT ["/usr/local/bin/hmac-file-server"]
+CMD ["-config", "/opt/hmac-file-server/config/config.toml"]
diff --git a/build-multi-arch.sh b/build-multi-arch.sh
new file mode 100755
index 0000000..6aea852
--- /dev/null
+++ b/build-multi-arch.sh
@@ -0,0 +1,313 @@
+#!/bin/bash
+# HMAC File Server 3.3.0 "Nexus Infinitum" - Multi-Architecture Builder
+# Builds binaries for multiple architectures and platforms
+
+set -euo pipefail
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+PURPLE='\033[0;35m'
+CYAN='\033[0;36m'
+NC='\033[0m'
+
+# Configuration
+VERSION="3.3.0"
+PROJECT_NAME="hmac-file-server"
+BUILD_DIR="builds"
+SOURCE_FILES="./cmd/server/"
+
+# Supported architectures
+declare -A PLATFORMS=(
+    ["linux/amd64"]="Linux AMD64 (Intel/AMD 64-bit)"
+    ["linux/arm64"]="Linux ARM64 (Apple Silicon, Raspberry Pi 4+)"
+    ["linux/arm"]="Linux ARM32v7 (Raspberry Pi 3+)"
+    ["linux/386"]="Linux 386 (32-bit Intel)"
+    ["darwin/amd64"]="macOS Intel"
+    ["darwin/arm64"]="macOS Apple Silicon"
+    ["windows/amd64"]="Windows 64-bit"
+    ["windows/386"]="Windows 32-bit"
+    ["freebsd/amd64"]="FreeBSD AMD64"
+    ["openbsd/amd64"]="OpenBSD AMD64"
+)
+
+# Functions
+print_header() {
+    echo -e "${BLUE}╔══════════════════════════════════════════════════════════════╗${NC}"
+    echo -e "${BLUE}║${NC} ${CYAN}HMAC File Server 3.3.0 'Nexus Infinitum' Multi-Arch Builder${NC} ${BLUE}║${NC}"
+    echo -e "${BLUE}╚══════════════════════════════════════════════════════════════╝${NC}"
+    echo ""
+}
+
+print_info() {
+    echo -e "${GREEN}✓${NC} $1"
+}
+
+print_warning() {
+    echo -e "${YELLOW}⚠${NC} $1"
+}
+
+print_error() {
+    echo -e "${RED}✗${NC} $1"
+}
+
+print_status() {
+    echo -e "${PURPLE}▶${NC} $1"
+}
+
+build_binary() {
+    local platform=$1
+    local description=$2
+    local goos=$(echo $platform | cut -d'/' -f1)
+    local goarch=$(echo $platform | cut -d'/' -f2)
+    
+    local output_name="${PROJECT_NAME}-${goos}-${goarch}"
+    if [ "$goos" = "windows" ]; then
+        output_name="${output_name}.exe"
+    fi
+    
+    local output_path="${BUILD_DIR}/${output_name}"
+    
+    print_status "Building for ${description} (${platform})..."
+    
+    # Set build environment
+    export GOOS=$goos
+    export GOARCH=$goarch
+    export CGO_ENABLED=0
+    
+    # Build with optimizations
+    if go build -ldflags="-w -s -X main.version=${VERSION}" -o "$output_path" $SOURCE_FILES; then
+        # Get file size
+        local size
+        if command -v stat >/dev/null 2>&1; then
+            if [[ "$OSTYPE" == "darwin"* ]]; then
+                size=$(stat -f%z "$output_path" 2>/dev/null | awk '{printf "%.1fMB", $1/1024/1024}')
+            else
+                size=$(stat -c%s "$output_path" 2>/dev/null | awk '{printf "%.1fMB", $1/1024/1024}')
+            fi
+        else
+            size="Unknown"
+        fi
+        
+        print_info "   ✓ Built ${output_name} (${size})"
+        return 0
+    else
+        print_error "   ✗ Failed to build ${output_name}"
+        return 1
+    fi
+}
+
+show_menu() {
+    echo -e "${YELLOW}Select build targets:${NC}"
+    echo ""
+    echo "1) All supported platforms (recommended)"
+    echo "2) Linux only (AMD64, ARM64, ARM32v7)"
+    echo "3) Cross-platform (Linux, macOS, Windows)"
+    echo "4) Custom selection"
+    echo "5) Quick build (Linux AMD64 only)"
+    echo ""
+    echo "0) Exit"
+    echo ""
+}
+
+build_all() {
+    print_status "Building for all supported platforms..."
+    local success=0
+    local total=0
+    
+    for platform in "${!PLATFORMS[@]}"; do
+        total=$((total + 1))
+        if build_binary "$platform" "${PLATFORMS[$platform]}"; then
+            success=$((success + 1))
+        fi
+    done
+    
+    echo ""
+    print_info "Build summary: $success/$total platforms successful"
+}
+
+build_linux_only() {
+    print_status "Building for Linux platforms..."
+    local platforms=("linux/amd64" "linux/arm64" "linux/arm")
+    local success=0
+    
+    for platform in "${platforms[@]}"; do
+        if build_binary "$platform" "${PLATFORMS[$platform]}"; then
+            success=$((success + 1))
+        fi
+    done
+    
+    echo ""
+    print_info "Linux build summary: $success/${#platforms[@]} platforms successful"
+}
+
+build_cross_platform() {
+    print_status "Building for cross-platform deployment..."
+    local platforms=("linux/amd64" "darwin/amd64" "darwin/arm64" "windows/amd64")
+    local success=0
+    
+    for platform in "${platforms[@]}"; do
+        if build_binary "$platform" "${PLATFORMS[$platform]}"; then
+            success=$((success + 1))
+        fi
+    done
+    
+    echo ""
+    print_info "Cross-platform build summary: $success/${#platforms[@]} platforms successful"
+}
+
+build_quick() {
+    print_status "Quick build for Linux AMD64..."
+    build_binary "linux/amd64" "${PLATFORMS["linux/amd64"]}"
+}
+
+build_custom() {
+    echo ""
+    echo -e "${YELLOW}Available platforms:${NC}"
+    local i=1
+    local platform_array=()
+    
+    for platform in "${!PLATFORMS[@]}"; do
+        echo "$i) $platform - ${PLATFORMS[$platform]}"
+        platform_array+=("$platform")
+        i=$((i + 1))
+    done
+    
+    echo ""
+    echo -n "Enter platform numbers (space-separated): "
+    read -r selections
+    
+    local success=0
+    local total=0
+    
+    for selection in $selections; do
+        if [[ "$selection" =~ ^[0-9]+$ ]] && [ "$selection" -ge 1 ] && [ "$selection" -le "${#platform_array[@]}" ]; then
+            local platform="${platform_array[$((selection - 1))]}"
+            total=$((total + 1))
+            if build_binary "$platform" "${PLATFORMS[$platform]}"; then
+                success=$((success + 1))
+            fi
+        else
+            print_warning "Invalid selection: $selection"
+        fi
+    done
+    
+    echo ""
+    print_info "Custom build summary: $success/$total platforms successful"
+}
+
+show_results() {
+    echo ""
+    echo -e "${CYAN}Build Results:${NC}"
+    echo "============="
+    
+    if [ -d "$BUILD_DIR" ] && [ "$(ls -A $BUILD_DIR 2>/dev/null)" ]; then
+        ls -lh "$BUILD_DIR"/ | tail -n +2 | while read -r line; do
+            echo "  $line"
+        done
+        
+        echo ""
+        print_info "Binaries available in: $BUILD_DIR/"
+        echo ""
+        echo -e "${YELLOW}Usage examples:${NC}"
+        echo "  ./builds/hmac-file-server-linux-amd64 -config config.toml"
+        echo "  ./builds/hmac-file-server-linux-arm64 -genconfig"
+        echo "  ./builds/hmac-file-server-darwin-amd64 -version"
+    else
+        print_warning "No binaries were built"
+    fi
+}
+
+cleanup_builds() {
+    if [ -d "$BUILD_DIR" ]; then
+        print_status "Cleaning previous builds..."
+        rm -rf "$BUILD_DIR"
+        print_info "Previous builds cleaned"
+    fi
+}
+
+# Main execution
+main() {
+    print_header
+    
+    # Check if Go is installed
+    if ! command -v go >/dev/null 2>&1; then
+        print_error "Go is not installed or not in PATH"
+        exit 1
+    fi
+    
+    print_info "Go version: $(go version)"
+    print_info "Building HMAC File Server ${VERSION}"
+    echo ""
+    
+    # Create build directory
+    mkdir -p "$BUILD_DIR"
+    
+    # Check if source files exist
+    if [ ! -d "$SOURCE_FILES" ]; then
+        print_error "Source files not found at: $SOURCE_FILES"
+        exit 1
+    fi
+    
+    while true; do
+        show_menu
+        echo -n "Choose an option [1-5, 0 to exit]: "
+        read -r choice
+        
+        case $choice in
+            1)
+                cleanup_builds
+                mkdir -p "$BUILD_DIR"
+                build_all
+                show_results
+                break
+                ;;
+            2)
+                cleanup_builds
+                mkdir -p "$BUILD_DIR"
+                build_linux_only
+                show_results
+                break
+                ;;
+            3)
+                cleanup_builds
+                mkdir -p "$BUILD_DIR"
+                build_cross_platform
+                show_results
+                break
+                ;;
+            4)
+                cleanup_builds
+                mkdir -p "$BUILD_DIR"
+                build_custom
+                show_results
+                break
+                ;;
+            5)
+                cleanup_builds
+                mkdir -p "$BUILD_DIR"
+                build_quick
+                show_results
+                break
+                ;;
+            0)
+                print_info "Goodbye!"
+                exit 0
+                ;;
+            *)
+                print_error "Invalid option. Please try again."
+                echo ""
+                ;;
+        esac
+    done
+    
+    # Reset environment
+    unset GOOS GOARCH CGO_ENABLED
+}
+
+# Run if executed directly
+if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
+    main "$@"
+fi
diff --git a/builddebian.sh b/builddebian.sh
index 30eb251..b13705e 100755
--- a/builddebian.sh
+++ b/builddebian.sh
@@ -4,13 +4,7 @@
 
 set -e
 
-# Type=simple
-Restart=always
-RestartSec=5
-EnvironmentFile=-/etc/default/hmac-file-server
-ExecStart=/usr/bin/hmac-file-server -config /etc/hmac-file-server/config.toml
-Documentation=https://git.uuxo.net/uuxo/hmac-file-server/
-User=hmac-file-serverutput
+# Colors for output
 GREEN='\033[0;32m'
 BLUE='\033[0;34m'
 YELLOW='\033[1;33m'
diff --git a/builds/hmac-file-server-darwin-amd64 b/builds/hmac-file-server-darwin-amd64
new file mode 100755
index 0000000..542a5df
Binary files /dev/null and b/builds/hmac-file-server-darwin-amd64 differ
diff --git a/builds/hmac-file-server-darwin-arm64 b/builds/hmac-file-server-darwin-arm64
new file mode 100755
index 0000000..1b4314d
Binary files /dev/null and b/builds/hmac-file-server-darwin-arm64 differ
diff --git a/builds/hmac-file-server-linux-386 b/builds/hmac-file-server-linux-386
new file mode 100755
index 0000000..5843232
Binary files /dev/null and b/builds/hmac-file-server-linux-386 differ
diff --git a/builds/hmac-file-server-linux-amd64 b/builds/hmac-file-server-linux-amd64
new file mode 100755
index 0000000..1d4a4ee
Binary files /dev/null and b/builds/hmac-file-server-linux-amd64 differ
diff --git a/builds/hmac-file-server-linux-arm b/builds/hmac-file-server-linux-arm
new file mode 100755
index 0000000..d9c4201
Binary files /dev/null and b/builds/hmac-file-server-linux-arm differ
diff --git a/builds/hmac-file-server-linux-arm64 b/builds/hmac-file-server-linux-arm64
new file mode 100755
index 0000000..9b65ea1
Binary files /dev/null and b/builds/hmac-file-server-linux-arm64 differ
diff --git a/docker-multiarch-build.sh b/docker-multiarch-build.sh
new file mode 100755
index 0000000..77edd64
--- /dev/null
+++ b/docker-multiarch-build.sh
@@ -0,0 +1,222 @@
+#!/bin/bash
+# HMAC File Server 3.3.0 "Nexus Infinitum" - Docker Multi-Architecture Builder
+# Builds multi-arch Docker images using Docker Buildx
+
+set -euo pipefail
+
+# Colors
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+PURPLE='\033[0;35m'
+CYAN='\033[0;36m'
+NC='\033[0m'
+
+# Configuration
+IMAGE_NAME="hmac-file-server"
+VERSION="3.3.0"
+REGISTRY="localhost"  # Change to your registry
+PLATFORMS="linux/amd64,linux/arm64,linux/arm/v7"
+
+# Functions
+print_header() {
+    echo -e "${BLUE}╔════════════════════════════════════════════════════════════╗${NC}"
+    echo -e "${BLUE}║${NC} ${CYAN}HMAC File Server Docker Multi-Architecture Builder${NC}      ${BLUE}║${NC}"
+    echo -e "${BLUE}╚════════════════════════════════════════════════════════════╝${NC}"
+    echo ""
+}
+
+print_info() {
+    echo -e "${GREEN}✓${NC} $1"
+}
+
+print_warning() {
+    echo -e "${YELLOW}⚠${NC} $1"
+}
+
+print_error() {
+    echo -e "${RED}✗${NC} $1"
+}
+
+print_status() {
+    echo -e "${PURPLE}▶${NC} $1"
+}
+
+check_requirements() {
+    print_status "Checking requirements..."
+    
+    # Check Docker
+    if ! command -v docker >/dev/null 2>&1; then
+        print_error "Docker is not installed or not in PATH"
+        exit 1
+    fi
+    
+    # Check Docker Buildx
+    if ! docker buildx version >/dev/null 2>&1; then
+        print_error "Docker Buildx is not available"
+        print_info "Install with: docker buildx install"
+        exit 1
+    fi
+    
+    # Check if Docker daemon is running
+    if ! docker info >/dev/null 2>&1; then
+        print_error "Docker daemon is not running"
+        exit 1
+    fi
+    
+    print_info "Docker $(docker --version | cut -d' ' -f3 | tr -d ',') detected"
+    print_info "Buildx $(docker buildx version | cut -d' ' -f2) detected"
+}
+
+setup_buildx() {
+    print_status "Setting up Docker Buildx..."
+    
+    # Create builder if it doesn't exist
+    if ! docker buildx inspect multiarch-builder >/dev/null 2>&1; then
+        print_status "Creating multiarch builder..."
+        docker buildx create --name multiarch-builder --use --bootstrap
+        print_info "Multiarch builder created and activated"
+    else
+        print_info "Using existing multiarch builder"
+        docker buildx use multiarch-builder
+    fi
+    
+    # Verify platforms
+    print_status "Available platforms:"
+    docker buildx inspect --bootstrap | grep "Platforms:" | head -1
+}
+
+build_images() {
+    local push_flag=""
+    if [ "${1:-}" = "--push" ]; then
+        push_flag="--push"
+        print_warning "Images will be pushed to registry"
+    else
+        push_flag="--load"
+        print_info "Images will be loaded locally (AMD64 only)"
+    fi
+    
+    print_status "Building multi-architecture images..."
+    
+    # Build and optionally push
+    docker buildx build \
+        --platform $PLATFORMS \
+        --file Dockerfile.multiarch \
+        --tag "${REGISTRY}/${IMAGE_NAME}:${VERSION}" \
+        --tag "${REGISTRY}/${IMAGE_NAME}:latest" \
+        $push_flag \
+        .
+    
+    if [ "$push_flag" = "--push" ]; then
+        print_info "Multi-arch images built and pushed successfully"
+    else
+        print_info "Multi-arch images built and loaded locally"
+    fi
+}
+
+test_images() {
+    print_status "Testing built images..."
+    
+    # Test AMD64 image (if loaded locally)
+    if [ "${1:-}" != "--push" ]; then
+        print_status "Testing AMD64 image..."
+        if docker run --rm "${REGISTRY}/${IMAGE_NAME}:${VERSION}" -version 2>/dev/null; then
+            print_info "AMD64 image test passed"
+        else
+            print_warning "AMD64 image test failed (this is normal if image wasn't loaded)"
+        fi
+    fi
+    
+    # Show image info
+    print_status "Image information:"
+    docker images "${REGISTRY}/${IMAGE_NAME}" 2>/dev/null | head -2 || print_warning "Images not found locally (normal if pushed to registry)"
+}
+
+show_usage() {
+    echo "Usage: $0 [OPTIONS]"
+    echo ""
+    echo "Options:"
+    echo "  --push          Build and push to registry (multi-arch)"
+    echo "  --local         Build for local use (AMD64 only)"
+    echo "  --registry REG  Set registry (default: localhost)"
+    echo "  --help          Show this help"
+    echo ""
+    echo "Examples:"
+    echo "  $0 --local                    # Build for local testing"
+    echo "  $0 --push                     # Build and push multi-arch"
+    echo "  $0 --registry hub.docker.com --push  # Push to Docker Hub"
+}
+
+# Main execution
+main() {
+    local push_mode=""
+    
+    # Parse arguments
+    while [[ $# -gt 0 ]]; do
+        case $1 in
+            --push)
+                push_mode="--push"
+                shift
+                ;;
+            --local)
+                push_mode="--local"
+                shift
+                ;;
+            --registry)
+                REGISTRY="$2"
+                shift 2
+                ;;
+            --help)
+                show_usage
+                exit 0
+                ;;
+            *)
+                print_error "Unknown option: $1"
+                show_usage
+                exit 1
+                ;;
+        esac
+    done
+    
+    print_header
+    
+    print_info "Configuration:"
+    print_info "  Image: ${REGISTRY}/${IMAGE_NAME}:${VERSION}"
+    print_info "  Platforms: ${PLATFORMS}"
+    print_info "  Registry: ${REGISTRY}"
+    echo ""
+    
+    check_requirements
+    setup_buildx
+    
+    echo ""
+    
+    if [ "$push_mode" = "--push" ]; then
+        build_images --push
+    else
+        build_images --local
+    fi
+    
+    echo ""
+    test_images "$push_mode"
+    
+    echo ""
+    print_info "Multi-architecture Docker build complete!"
+    
+    if [ "$push_mode" = "--push" ]; then
+        echo ""
+        print_info "To use the images:"
+        echo "  docker run -p 8080:8080 ${REGISTRY}/${IMAGE_NAME}:${VERSION}"
+        echo "  docker run --platform linux/arm64 ${REGISTRY}/${IMAGE_NAME}:${VERSION}"
+    else
+        echo ""
+        print_info "To push to registry later:"
+        echo "  $0 --registry YOUR_REGISTRY --push"
+    fi
+}
+
+# Check if script is executed directly
+if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
+    main "$@"
+fi