Add dev + prod modes.

package.json

@@ -4,12 +4,14 @@
   "description": "A free and open-source project that aims to provide an easily accessible translation service for Minecraft mod developers through crowdsourcing",
   "private": true,
   "main": "build/server.mjs",
+  "type": "module",
   "scripts": {
     "build": "concurrently \"pnpm:build:fastify\" \"pnpm:build:nextjs\"",
     "postinstall": "cd ./src/nextjs-app && pnpm install",
     "build:fastify": "vite build --outDir build --ssr src/server.ts",
     "build:nextjs": "cd ./src/nextjs-app && pnpm run build",
-    "dev": "concurrently \"pnpm:build:fastify\" \"pnpm:dev:nextjs\"",
+    "dev": "concurrently \"tsx src/server.ts\" \"pnpm dev:nextjs\"",
+    "dev:nextjs": "cd ./src/nextjs-app && pnpm run dev",
     "start": "pnpm run build && node build/server.mjs",
     "format": "prettier --config .prettierrc \"src/**/*.{js,json,ts,css,scss,vue,html,md}\" --write"
   },
@@ -28,6 +30,8 @@
     "concurrently": "^8.2.2",
     "jsdom": "^20.0.2",
     "prettier": "^3.3.2",
+    "ts-node-dev": "^2.0.0",
+    "tsx": "^3.12.7",
     "vite": "^3.2.4"
   }
 }