👷(CI) add test-e2e job to people.yml

Add test-e2e to people.yml, it will run e2e tests on every PR.
Steps:
  - set env vars for e2e tests
  - build and start docker servers
  (backend, keycloak, DB)
  - install playwright
  - build apps
  - run e2e tests
  - save reports

src/frontend/package.json

@@ -14,6 +14,7 @@
     "app:start": "yarn APP_DESK run start",
     "app:build": "yarn APP_DESK run build",
     "app:test": "yarn APP_DESK run test",
+    "ci:build": "yarn APP_DESK run build:ci",
     "e2e:test": "yarn APP_E2E run test"
   },
   "resolutions": {