chore: extract middleware config

apps/server/src/middleware/bodyParser.ts

@@ -0,0 +1,3 @@
+import express from 'express';
+
+export const bodyParser = [express.urlencoded({ extended: true }), express.json({ limit: '1mb' })];

apps/server/src/middleware/staticGZip.ts

@@ -0,0 +1,26 @@
+import expressStaticGzip from 'express-static-gzip';
+import { extname } from 'node:path';
+
+import { srcDir } from '../setup/index.js';
+
+// serve static - react, in dev/test mode we fetch the React app from module
+export const compressedStatic = expressStaticGzip(srcDir.clientDir, {
+  enableBrotli: true,
+  orderPreference: ['br'],
+  // when we build the client the file names contain a unique hash for the build
+  // this allows us to use the immutable tag
+  // as the contents of a build file will never change without also changing its name
+  // meaning that the client does not need to revalidate the contents with the server
+  serveStatic: {
+    etag: false,
+    lastModified: false,
+    immutable: true,
+    maxAge: '1y',
+    setHeaders: (res, file) => {
+      // make sure the HTML files are always revalidated
+      if (extname(file) === '.html') {
+        res.setHeader('Cache-Control', 'public, max-age=0');
+      }
+    },
+  },
+});