test(webapp): provide tests in CI

- add url and page as env variables to choice where to test and update the others
- To pass a variable to a job's service, they have to be declared in the "variables" global -> doesn't work (see: [#37])
- use of the deployed image to do E2E test instead of services of gitlab

web-app/package.json

@@ -7,7 +7,9 @@
     "build": "vue-cli-service build",
     "cypress:open": "cypress open",
     "cypress:run": "cypress run",
-    "test": "cypress run --spec 'cypress/e2e/*.cy.ts'"
+    "test:e2e": "cypress run --spec 'cypress/e2e/*.cy.ts'",
+    "test:unit": "cypress run --spec 'cypress/unit/*.cy.ts'",
+    "test": "test:unit | test:e2e"
   },
   "dependencies": {
     "axios": "^1.9.0",