feat: Add docker-compose for easier application management

This commit introduces a `docker-compose.yml` file to simplify the
process of building, running, and managing the application.

- Defines the `bpb-website` service with build context, port mapping,
  and environment variables.
- Mounts a volume for `update.json` to ensure data persistence across
  container restarts.
- Sets `restart: always` to ensure the service is automatically
  restarted if it goes down.

docker-compose.yml

@@ -0,0 +1,13 @@
+version: '3.8'
+
+services:
+  bpb-website:
+    build: .
+    ports:
+      - "3050:3050"
+    environment:
+      ADMIN_PASSWORD: your_secure_password # IMPORTANT: Replace with a strong password
+      NODE_ENV: production
+    volumes:
+      - ./update.json:/usr/src/app/update.json # Persist update.json changes
+    restart: always