fix: use correct env variable

Author: oae

src/utils/trpc.ts

@@ -14,10 +14,10 @@ function getBaseUrl() {
 
   if (process.env.RENDER_INTERNAL_HOSTNAME)
     // reference for render.com
-    return `http://${process.env.RENDER_INTERNAL_HOSTNAME}:${process.env.PORT}`;
+    return `http://${process.env.RENDER_INTERNAL_HOSTNAME}:${process.env.KAIZOKU_PORT}`;
 
   // assume localhost
-  return `http://localhost:${process.env.PORT ?? 3000}`;
+  return `http://localhost:${process.env.KAIZOKU_PORT ?? 3000}`;
 }
 
 export const trpc = createTRPCNext<AppRouter>({