Update the local-dev UI URL to match recent changes

Without this, everything worked OK, but some features (notably including
account login) failed, since we now expect normal localhost as standard.

Author: pimterry

package.json

@@ -15,7 +15,7 @@
     "build:electron": "npm run server:setup && electron-builder build",
     "build:dir-only": "npm run server:setup && electron-builder --dir",
     "start": "npm run server:setup && npm run start:app",
-    "start:dev": "ts-node ./skip-server.ts && cross-env HTK_DEV=true APP_URL='http://local.httptoolkit.tech:8080' npm run start:app",
+    "start:dev": "ts-node ./skip-server.ts && cross-env HTK_DEV=true APP_URL='http://localhost:8080' npm run start:app",
     "start:app": "tsc-watch --onSuccess \"electron .\""
   },
   "keywords": [],