Add update.sh for docker/podman auto-detect and refresh

update.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+# Update script for Journey FM Playlist project.
+#  - pulls latest code from GitHub
+#  - rebuilds and restarts container
+#  - supports docker or podman (auto-detect or ask)
+
+set -e
+
+REPO_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
+cd "$REPO_DIR"
+
+if [ ! -d .git ]; then
+    echo "Error: this directory is not a git repository. Run this script from repository root."
+    exit 1
+fi
+
+# Determine container tool
+CONTAINER_TOOL=""
+if command -v docker >/dev/null 2>&1; then
+    CONTAINER_TOOL="docker"
+fi
+if command -v podman >/dev/null 2>&1; then
+    if [ -n "$CONTAINER_TOOL" ]; then
+        echo "Both docker and podman are installed. Choose one:"
+        select t in docker podman; do
+            [ -n "$t" ] && CONTAINER_TOOL="$t" && break
+            echo "Invalid choice"
+        done
+    else
+        CONTAINER_TOOL="podman"
+    fi
+fi
+
+if [ -z "$CONTAINER_TOOL" ]; then
+    echo "No docker or podman binary found. Please install one and retry."
+    exit 1
+fi
+
+COMPOSE_CMD="$CONTAINER_TOOL compose"
+
+# Pull latest branch
+echo "Pulling latest code from origin/main..."
+git fetch origin
+if git rev-parse --abbrev-ref HEAD | grep -q "^main$"; then
+    git reset --hard origin/main
+else
+    echo "Not on main branch; pulling and fast-forwarding current branch if possible..."
+    git pull --ff-only
+fi
+
+# Rebuild and restart in compose
+echo "Building container with $COMPOSE_CMD..."
+$COMPOSE_CMD build
+
+echo "Bringing container up..."
+$COMPOSE_CMD up -d
+
+# Provide status
+echo "Container status:"
+$COMPOSE_CMD ps
+
+echo "Done. Web dashboard is available at http://localhost:8765 (if enabled)."