Fix extra checks

[BramMeir]

• Option to show the generated artifacts to the students
• Option to remove private docker images
• Fix new students join individual projects automatically
• Remove emojis after democratic decision

[francisvaut]

Looks good overall, but I don't know what exactly goes wrong but when creating a project with multiple extra checks and different combinations for artifacts and logs visibilty, I get the following error:

ValueError: Field 'id' expected a number but got ''.
"POST /api/projects/4/extra_checks/ HTTP/1.0" 500 19216
 Internal Server Error: /api/projects/4/extra_checks/

[BramMeir]

Looks good overall, but I don't know what exactly goes wrong but when creating a project with multiple extra checks and different combinations for artifacts and logs visibilty, I get the following error:

ValueError: Field 'id' expected a number but got ''.
"POST /api/projects/4/extra_checks/ HTTP/1.0" 500 19216
 Internal Server Error: /api/projects/4/extra_checks/

I see the issue, when you create multiple extra checks the form is reset. But by doing this, the docker image field is set to a default empty one. So when you don't select a docker image in the list, this passes the validation but will not work when making the request. I will fix that.

[Topvennie]

👻

[francisvaut]

Nice 🙌