chore: refactor to add go app

node/README.md

@@ -0,0 +1,15 @@
+# Demo app
+Create a `.env` file containing
+```env
+OIDC_CLIENT_ID=<CLIENT ID>
+OIDC_CLIENT_SECRET=<CLIENT SECRET>
+OIDC_ISSUER=https://auth.example.org
+SIGNING_SECRET=<LONG RANDOM STRING>
+APP_BASE_URL=https://app.example.org
+```
+
+You can then run the app using
+```bash
+tsc && node --env-file=.env dist/index.js
+```
+The app should be served via HTTPS on a reverse proxy.