Publish to Pypi and version tag workflow

.github/workflows/publish_and_tag.yml

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+# Workflow to send master to pypi and tag  the branch:
+# You need to edit FOLDER_WITH_VERSION with the folder that has the __version__ value.
+
+name: main to pypi with comments and tag
+
+
+# Controls when the action will run. Triggers the workflow on push or pull request
+# events but only for the master branch
+on:
+  push:
+    branches: [ main ]
+
+env:
+  FOLDER_WITH_VERSION: cryo_challenge
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  deploy:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up MPI
+      uses: mpi4py/setup-mpi@v1
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: '3.8'
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install setuptools wheel twine
+        pip install scipion-pyworkflow 
+        pip install scipion-em
+    - name: Build and publish
+      env:
+        TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
+        TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
+      run: |
+        python setup.py sdist bdist_wheel
+        twine upload dist/* -c "${{ secrets.PYPI_COMMENT }}"
+    - name: Get version and tag
+      run: |
+        export PACKAGE_VERSION=$(python -c "import $FOLDER_WITH_VERSION; print('v'+$FOLDER_WITH_VERSION.__version__);"| tail -n 1)
+        git tag $PACKAGE_VERSION
+        git push origin $PACKAGE_VERSION