Let user define image name

[pierrepo]

From

• repository URL https://github.com/plasmabio/template-python
• and reference master,

automatic name for Docker image is plasmabio-template-python-master.

This is very efficient but not very informative for teachers and students.

Could we add a Name field in the environment creation form to let teacher input a more meaningful name? For instance, 2020-MEG-M1-UE1

The Name field should be restricted to a given set of characters (A-Z, a-Z, 0-9, -)

[jtpio]

The Name field should be restricted to a given set of characters (A-Z, a-Z, 0-9, -)

If the display name is stored as a label like the other fields, this restriction might not even be required.

[pierrepo]

One another request would be that this custom name also become the name of the directory in which environment files are copied into.