feat: add frontend nginx image

docker-compose.prod.yml

@@ -1,11 +1,20 @@
 version: '3'
 services:
   app:
+    image: lancatlin/linux-odyssey:app
+    build:
+      context: .
+      dockerfile: app/Dockerfile
+    networks:
+      internal:
+    ports:
+      - 8080:80
+  backend:
     image: lancatlin/linux-odyssey
     restart: on-failure
     build:
       context: .
-      dockerfile: Dockerfile
+      dockerfile: server/Dockerfile
     networks:
       - internal
       - players