[INFRA] Allow e2e tests to pass on gitpod

[aibcmars]

Due to the fact that default image lacks certain libraries needed for the puppeteer to lanch, the new enhanced Dockerfile was created.

[tbouffard]

Running a fresh workspace, the npm install script was not run.
This is probably because there was no .gitpod.yml in the master branch.

After having switched to the branch of this pr that has the init tasks, run npm install, the e2e tests fail.

I have removed the node_modules, then restarted the workspace. The node_modules folder is not created.
e2e tests still fail.

[aibcmars]

Running a fresh workspace, the npm install script was not run.
This is probably because there was no .gitpod.yml in the master branch.

After having switched to the branch of this pr that has the init tasks, run npm install, the e2e tests fail.

I have removed the node_modules, then restarted the workspace. The node_modules folder is not created.
e2e tests still fail.

Maybe there is some issues with running Gitpod from PR?

I have just tested by running it from my GitHub branch and tests are passing.
https://github.com/aibcmars/bpmn-visualization-js/tree/infra-gitpod_e2e_tests_fix

[tbouffard]

Ok, I will retest with a fresh workspace created from the branch of this PR as described in https://www.gitpod.io/docs/context-urls/#branch-context
https://gitpod.io/#https://github.com/aibcmars/bpmn-visualization-js/tree/infra-gitpod_e2e_tests_fix

[tbouffard]

✔️ Creating the workspace with the branch of this PR works fine
The workspace creation is a bit more slower than before because of the need for rebuilding the Docker image. We may document this.

npm install is run at workspace startup

I got some errors in the log when running e2e tests, but tests pass, so we can check this later

DevTools listening on ws://127.0.0.1:37159/devtools/browser/0b3bc7ae-2c8a-4798-a632-4baeeae23834
[1005/093724.729728:ERROR:zygote_host_impl_linux.cc(263)] Failed to adjust OOM score of renderer with pid 2871: Permission denied (13)
[1005/093724.732990:ERROR:zygote_host_impl_linux.cc(263)] Failed to adjust OOM score of renderer with pid 2875: Permission denied (13)
...
1005/093753.206752:ERROR:zygote_host_impl_linux.cc(263)] Failed to adjust OOM score of renderer with pid 3267: Permission denied (13)

[tbouffard]

LGTM, works fine, thanks