feat: add nginx to serve media

Signed-off-by: Ameya Shenoy <shenoy.ameya@gmail.com>

docker-compose.prod.yml

@@ -10,6 +10,12 @@ services:
       dockerfile: Dockerfile
     restart: unless-stopped
 
+  media:
+    image: nginx:alpine
+    restart: unless-stopped
+    volumes:
+      - ./backend/media_cdn::/usr/share/nginx/html/media:ro
+
   backend:
     image: foldbank-backend-prod
     build: