browser-esbuild builder is not validating proxy.conf.json

[zip-fa]

Command

serve

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

webpack browser builder

Description

Hi. I have invalid proxy.conf.json file, with this content:

{
  "/cdn": {
    "target": "https://website.com",
    "secure": false,
    "changeOrigin": true,
    "logLevel": "debug"
  },
  "changeOrigin": true
}

Look at the "changeOrigin": true at the end.
It was in my project since angular v8, and now it breaks with esbuild.
I removed this line after i finally realised what caused ng serve to fail. Maybe there should be some kind of validation before starting dev server?

Minimal Reproduction

https://stackblitz.com/edit/angular-at-dwjtto?file=proxy.conf.json

Exception or Error

TypeError: Cannot use 'in' operator to search for 'pathRewrite' in true
    at normalizeProxyConfiguration (/node_modules/@angular-devkit/build-angular/src/builders/dev-server/load-proxy-config.js:146:27)
    at loadProxyConfiguration (/node_modules/@angular-devkit/build-angular/src/builders/dev-server/load-proxy-config.js:98:30)
    at async setupServer (/node_modules/@angular-devkit/build-angular/src/builders/dev-server/vite-server.js:232:19)
    at async serveWithVite (/node_modules/@angular-devkit/build-angular/src/builders/dev-server/vite-server.js:118:41)

Your Environment

Angular: 17.0.0-next.7
... animations, cli, common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, router

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1700.0-next.7
@angular-devkit/build-angular   17.0.0-next.7
@angular-devkit/core            17.0.0-next.7
@angular-devkit/schematics      17.0.0-next.7
@angular/cdk                    17.0.0-next.5
@angular/material               17.0.0-next.5
@schematics/angular             17.0.0-next.7
rxjs                            7.4.0
typescript                      5.2.2
zone.js                         0.13.0

Anything else relevant?

No response

[angular-automatic-lock-bot]

This issue has been automatically locked due to inactivity.
Please file a new issue if you are encountering a similar or related problem.

Read more about our automatic conversation locking policy.

_{This action has been performed automatically by a bot.}