Restore PyPI source distribution (#42)

* Publish source distribution to PyPI

* Remove requirements.txt

Author: dinvlad

.github/workflows/publish-pypi.yml

@@ -31,7 +31,8 @@ jobs:
 
     - name: Build wheels
       working-directory: server
-      run: python -m pip wheel . --no-deps -w dist
+      run: python -m pip install wheel &&
+           python setup.py sdist bdist_wheel
 
     - name: Publish package distributions to PyPI
       if: github.event_name == 'release'