Add image to browser-tests

.gitlab-ci.yml

@@ -66,6 +66,7 @@ stages:
 # Docker host based testing (must be run inside dind or docker-enabled host)
 .browser_test_linux_template: &linux_browser_test_job
   stage: browser-test
+  image: docker.idiap.ch/beat/beat.env.editor:0.0.1r4
   before_script:
     # safe keep artifacts as before_build.sh will erase those...
     - mv ${CONDA_ROOT}/conda-bld .