refactor: move quests out of server

+ move quests from server/quests to ./quests
+ add frontend image in docker compose development

docker-compose.prod.yml

@@ -10,7 +10,7 @@ services:
     ports:
       - 8080:80
   backend:
-    image: lancatlin/linux-odyssey
+    image: lancatlin/linux-odyssey:backend
     restart: on-failure
     build:
       context: .