Add env check and global env infer type

env.ts

@@ -0,0 +1,15 @@
+import { z } from "zod";
+const envVariables = z.object({ 
+    DATABASE_URL: z.string(), 
+    JWT_SECRET: z.string(),
+    WS_PORT: z.string(),
+    WS_HOST: z.string()
+});
+envVariables.parse(process.env);
+
+declare global {
+	namespace NodeJS {
+		interface ProcessEnv extends z.infer<typeof envVariables> {}
+	}
+}
+

package.json

@@ -3,7 +3,8 @@
   "version": "0.0.1",
   "private": true,
   "scripts": {
-    "dev": "next dev",
+    "check-env": "bun run ./env.ts",
+    "dev": "bun run check-env && next dev",
     "build": "next build",
     "start": "next start",
     "lint": "next lint",