Update cloudbuild.yaml

adding env variables to cloud runner

Author: charlesa101

cloudbuild.yaml

@@ -5,3 +5,7 @@ steps:
   args: ["push", "gcr.io/${PROJECT_ID}/almeta-doccano:${BRANCH_NAME}"]
 - name: 'gcr.io/cloud-builders/gcloud'
   args: ['beta', 'run', 'deploy', 'almeta-doccano', '--image', 'gcr.io/${PROJECT_ID}/almeta-doccano:${BRANCH_NAME}', '--region', 'us-central1', '--memory', '2G', '--platform', 'managed', '--allow-unauthenticated']
+  env:
+   - 'ADMIN_USERNAME=admin'
+   - '[email protected]'
+   - 'ADMIN_PASSWORD=password'