Add public endpoints and refactor deployments

- Implemented public `/gallery/public` and `/events/public` endpoints for fetching published data without authentication.
- Updated persistent volume configuration for Fly.io across backend and static file serving.
- Adjusted frontend to dynamically fetch events and gallery images from backend API.
- Refined Woodpecker pipeline for clearer separation of backend and frontend deployments.

backend/src/index.ts

@@ -60,10 +60,12 @@ fastify.register(multipart, {
   },
 });
 
-// Serve static files (uploaded images, etc.)
+// Serve static files (uploaded images, etc.) from persistent volume
+const dataDir = env.GIT_WORKSPACE_DIR || path.join(process.cwd(), 'data');
 fastify.register(fastifyStatic, {
-  root: path.join(process.cwd(), 'public'),
+  root: dataDir,
   prefix: '/static/',
+  decorateReply: false
 });
 
 // Decorate fastify with authenticate method