refactor: move quests out of server

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

app/package.json

@@ -6,6 +6,7 @@
   "scripts": {
     "dev": "API_TARGET=https://odyssey.wancat.cc vite",
     "dev:local": "vite",
+    "dev:docker": "API_TARGET=http://backend:3000 vite",
     "build": "vite build",
     "preview": "vite preview"
   },