Proxy testing: Add a proxying option in next.js

Note: unfortunately, you can't use: return NextResponse.rewrite(...)
here, otherwise you get an error like:

    [Next] - error Error: API route returned a Response object in the Node.js runtime, this is not supported. Please use
    `runtime: "edge"` instead: https://nextjs.org/docs/api-routes/edge-api-routes

Which is precisely what we *don't* want.

frontend/next.config.js

@@ -94,8 +94,8 @@ const moduleExports = {
                destination: `https://proxy-us-east.ifixit.com/health-check/proxy-us-east/:path*`,
             },
             {
-               source: '/:path*',
-               destination: `https://proxy.ifixit.com/health-check/fallback/:path*`,
+               source: '/proxy-nextjs-test/:path*',
+               destination: `/api/php-app/health-check/proxy-nextjs-test/:path*`,
             },
          ],
       };

frontend/package.json

@@ -59,6 +59,7 @@
       "dayjs": "1.10.5",
       "framer-motion": "10.12.0",
       "graphql": "15.5.3",
+      "http-proxy": "^1.18.1",
       "ioredis": "5.2.4",
       "lite-youtube-embed": "^0.2.0",
       "lodash": "4.17.21",

frontend/pages/api/php-app/[[...path]].ts

@@ -0,0 +1,18 @@
+import type { NextApiHandler, NextApiRequest, NextApiResponse } from 'next';
+import { NextResponse } from 'next/server';
+import httpProxy from 'http-proxy';
+
+const proxy = httpProxy.createProxyServer({
+   secure: true,
+   changeOrigin: true,
+});
+
+const handler: NextApiHandler = async (
+   req: NextApiRequest,
+   res: NextApiResponse
+) => {
+   const dest = `https://proxy-us-east.ifixit.com/health-check${req.url}`;
+   proxy.web(req, res, { target: dest });
+};
+
+export default handler;