feat: Consolidate client and server into a single Docker image and update Docker Compose configuration.

server/index.js

@@ -19,7 +19,11 @@ initDb();
 app.use('/api', routes);
 
 // Serve static files from the React app build directory
-app.use(express.static(path.join(__dirname, '../client/dist')));
+// In Docker container, this is at /app/client/dist
+const staticPath = process.env.NODE_ENV === 'production'
+    ? path.join(__dirname, '../client/dist')
+    : path.join(__dirname, '../client/dist');
+app.use(express.static(staticPath));
 
 // Handle social previews for shared event links
 app.get('/event/:id', (req, res) => {