464-Optional code of conduct

[lyashevska]

Description

• I have read the contribution guidelines
• This update is in line with what is recommended in the Python chapter of the Guide
• All user facing changes have been added to CHANGELOG.md

Make code of conduct optional.

Related issues:

• Add optional question to copier questionnaire: code of conduct #464

Install the requirements

cd $(mktemp -d --tmpdir py-tmpl-XXXXXX)
pip install pipx
pipx install copier

Test 1:

Step-1:
Run the command below and say 'yes' to code of conduct question.

copier copy --vcs-ref 464-codeconduct https://github.com/nlesc/python-template test_yes

Step-2:
Run the command below and say 'no' to code of conduct question

copier copy --vcs-ref 464-codeconduct https://github.com/nlesc/python-template test_no

What to check:
You should see the files below only when you say 'yes':

• CODE_OF_CONDUCT.md
• project_setup.md should contain a reference to the code of conduct
• CONTRIBUTING.md should contain a reference to the code of conduct

[fdiblen]

looks great! 👏