Enhance README and RPC for package management

- Added instructions to README.md for building an ISO from source and flashing it to USB.
- Introduced a new RPC method for package installation, including security checks and container management.
- Updated Docker and Podman integration in build scripts to support both container runtimes.
- Enhanced Nginx configuration for improved timeout settings and WebSocket support.
- Added new app metadata for additional applications in the Docker package scanner.

image-recipe/build-auto-installer-iso.sh

@@ -30,16 +30,27 @@ echo ""
 # Check for required tools
 check_tools() {
     local missing=""
-    for tool in docker xorriso; do
-        if ! command -v $tool >/dev/null 2>&1; then
-            missing="$missing $tool"
-        fi
-    done
+    
+    # Check for docker or podman
+    if command -v docker >/dev/null 2>&1; then
+        CONTAINER_CMD="docker"
+    elif command -v podman >/dev/null 2>&1; then
+        CONTAINER_CMD="podman"
+    else
+        missing="$missing docker-or-podman"
+    fi
+    
+    if ! command -v xorriso >/dev/null 2>&1; then
+        missing="$missing xorriso"
+    fi
+    
     if [ -n "$missing" ]; then
         echo "❌ Missing required tools:$missing"
-        echo "   Install with: brew install$missing"
+        echo "   Install with: apt install docker.io xorriso (or podman)"
         exit 1
     fi
+    
+    echo "Using container runtime: $CONTAINER_CMD"
 }
 
 check_tools
@@ -182,13 +193,13 @@ RestartSec=5
 WantedBy=multi-user.target
 SYSTEMDSERVICE
 
-    echo "   Building Docker image (this may take a few minutes)..."
-    docker build --platform linux/amd64 -t archipelago-rootfs -f "$WORK_DIR/Dockerfile.rootfs" "$WORK_DIR"
+    echo "   Building $CONTAINER_CMD image (this may take a few minutes)..."
+    $CONTAINER_CMD build --platform linux/amd64 -t archipelago-rootfs -f "$WORK_DIR/Dockerfile.rootfs" "$WORK_DIR"
     
     echo "   Exporting filesystem..."
-    docker create --platform linux/amd64 --name archipelago-rootfs-tmp archipelago-rootfs
-    docker export archipelago-rootfs-tmp > "$ROOTFS_TAR"
-    docker rm archipelago-rootfs-tmp
+    $CONTAINER_CMD create --platform linux/amd64 --name archipelago-rootfs-tmp archipelago-rootfs
+    $CONTAINER_CMD export archipelago-rootfs-tmp > "$ROOTFS_TAR"
+    $CONTAINER_CMD rm archipelago-rootfs-tmp
     
     echo "✅ Root filesystem created: $(du -h "$ROOTFS_TAR" | cut -f1)"
 else
@@ -242,12 +253,12 @@ COPY core ./core
 RUN cd core && cargo build --release --bin archipelago
 BACKENDFILE
 
-if docker build --platform linux/amd64 -t archipelago-backend -f "$BACKEND_DOCKERFILE" "$SCRIPT_DIR/.." 2>&1 | tail -20; then
+if $CONTAINER_CMD build --platform linux/amd64 -t archipelago-backend -f "$BACKEND_DOCKERFILE" "$SCRIPT_DIR/.." 2>&1 | tail -20; then
     echo "   Extracting backend binary..."
-    BACKEND_CONTAINER=$(docker create --platform linux/amd64 archipelago-backend)
-    docker cp "$BACKEND_CONTAINER:/build/core/target/release/archipelago" "$ARCH_DIR/bin/" && \
+    BACKEND_CONTAINER=$($CONTAINER_CMD create --platform linux/amd64 archipelago-backend)
+    $CONTAINER_CMD cp "$BACKEND_CONTAINER:/build/core/target/release/archipelago" "$ARCH_DIR/bin/" && \
         echo "   ✅ Backend binary included ($(du -h "$ARCH_DIR/bin/archipelago" | cut -f1))"
-    docker rm "$BACKEND_CONTAINER"
+    $CONTAINER_CMD rm "$BACKEND_CONTAINER"
 else
     echo "   ⚠️  Backend build failed - using existing binary if available"
     if [ -f "$SCRIPT_DIR/../core/target/release/archipelago" ]; then
@@ -311,9 +322,9 @@ echo "$CONTAINER_IMAGES" | while read -r image filename; do
         echo "   ✅ Using cached: $filename"
     else
         echo "   Pulling $image (linux/amd64)..."
-        if docker pull --platform linux/amd64 "$image"; then
+        if $CONTAINER_CMD pull --platform linux/amd64 "$image"; then
             echo "   Saving $filename..."
-            docker save "$image" -o "$tarpath"
+            $CONTAINER_CMD save "$image" -o "$tarpath"
             echo "   ✅ Saved: $(du -h "$tarpath" | cut -f1)"
         else
             echo "   ⚠️  Failed to pull $image - skipping"
@@ -729,7 +740,7 @@ TOOLS_DIR="$WORK_DIR/tools-extract"
 rm -rf "$TOOLS_DIR"
 mkdir -p "$TOOLS_DIR"
 
-docker run --rm --platform linux/amd64 \
+$CONTAINER_CMD run --rm --platform linux/amd64 \
     -v "$TOOLS_DIR:/output" \
     debian:bookworm \
     bash -c '
@@ -879,9 +890,9 @@ mkdir -p "$LIVE_DIR"
 if command -v mksquashfs >/dev/null 2>&1; then
     mksquashfs "$OVERLAY_DIR" "$LIVE_DIR/99-archipelago.squashfs" -comp xz -noappend
 else
-    # Use Docker to create squashfs on macOS
-    echo "   Using Docker to create squashfs..."
-    docker run --rm --platform linux/amd64 \
+    # Use $CONTAINER_CMD to create squashfs on macOS
+    echo "   Using $CONTAINER_CMD to create squashfs..."
+    $CONTAINER_CMD run --rm --platform linux/amd64 \
         -v "$OVERLAY_DIR:/overlay:ro" \
         -v "$LIVE_DIR:/output" \
         debian:bookworm \