Server-side printing, roll type setting, cache headers

package.json

@@ -7,6 +7,7 @@
   "scripts": {
     "start": "node src/server.js",
     "dev": "node --watch src/server.js",
+    "version": "node scripts/version.mjs",
     "gen-secret": "node -e \"console.log(require('crypto').randomBytes(32).toString('hex'))\""
   },
   "engines": {