Migrate CI to GitHub Actions

[n1k0sv]

No description provided.

[codecov]

Codecov Report

Merging #42 (c3fc801) into devel (855eeb1) will increase coverage by 0.13%.
The diff coverage is 95.87%.

@@            Coverage Diff             @@
##            devel      #42      +/-   ##
==========================================
+ Coverage   76.61%   76.75%   +0.13%     
==========================================
  Files          33       33              
  Lines        2613     2667      +54     
==========================================
+ Hits         2002     2047      +45     
- Misses        611      620       +9     

Impacted Files	Coverage Δ
transifex/common/console.py	77.77% <ø> (ø)
transifex/native/django/utils/__init__.py	91.66% <75.00%> (ø)
transifex/native/django/utils/templates.py	96.07% <75.00%> (+0.07%)	⬆️
transifex/common/utils.py	97.75% <89.47%> (-2.25%)	⬇️
transifex/native/cds.py	97.84% <100.00%> (+0.14%)	⬆️
transifex/native/core.py	100.00% <100.00%> (ø)
transifex/native/django/management/common.py	86.66% <100.00%> (ø)
...ransifex/native/django/management/utils/migrate.py	95.23% <100.00%> (+0.79%)	⬆️
transifex/native/django/management/utils/push.py	100.00% <100.00%> (ø)
transifex/native/django/templatetags/transifex.py	95.78% <100.00%> (+0.09%)	⬆️
... and 5 more

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[kbairak]

Looks great and works great. Publishing to PyPI remains to be seen, but I have no reason to believe it won't work.

I have a suggestion for when we have time to experiment.

We can use docker save and docker load to save and load docker images to tar archives and use workflow artifacts to share them between the jobs of the github action. This way, we won't have to rebuild the images for code checks and test runs.

[kbairak]

Any reason this is lowercase but {{secrets.PYPI_API_TOKEN}} below is uppercase?