ci: force use of shared gitlab runner named "docker" and define the docker...

ci: force use of shared gitlab runner named "docker" and define the docker image as geaucassiopee/ci-cd-cross-platform-webapp:first

Refs #557 (closed)

.gitlab-ci.yml

@@ -9,6 +9,10 @@ stages:
   - releases-nightly
   - releases-version
 
+default:
+  tags: [docker]
+  image: geaucassiopee/ci-cd-cross-platform-webapp:first
+
 variables:
 # from Gitlab CI/CD environment variables :
 # - development server :