fix: chdir to site root (#1265)

Author: ascorbic

Diff for: demos/default/pages/api/hello.js

@@ -1,5 +1,5 @@
 // Next.js API route support: https://nextjs.org/docs/api-routes/introduction
 
 export default (req, res) => {
-  res.status(200).json({ name: 'John Doe', query: req.query, env: process.env.HELLO_WORLD })
+  res.status(200).json({ name: 'John Doe', query: req.query, env: process.env.HELLO_WORLD, cwd: process.cwd() })
 }

Diff for: src/templates/getHandler.ts

@@ -27,6 +27,11 @@ type Mutable<T> = {
 // We return a function and then call `toString()` on it to serialise it as the launcher function
 // eslint-disable-next-line max-params
 const makeHandler = (conf: NextConfig, app, pageRoot, staticManifest: Array<[string, string]> = [], mode = 'ssr') => {
+  // Change working directory into the site root
+  const dir = path.resolve(__dirname, app)
+
+  process.chdir(dir)
+
   // This is just so nft knows about the page entrypoints. It's not actually used
   try {
     // eslint-disable-next-line node/no-missing-require
@@ -65,7 +70,7 @@ const makeHandler = (conf: NextConfig, app, pageRoot, staticManifest: Array<[str
     const NextServer: NextServerType = getNextServer()
     const nextServer = new NextServer({
       conf,
-      dir: path.resolve(__dirname, app),
+      dir,
       customServer: false,
       hostname: url.hostname,
       port,