Added docs deployment workflow

Author: vadyushkins

.github/workflows/deploy_docs.yml

@@ -0,0 +1,34 @@
+name: Deploy docs
+
+on: [ push, pull_request ]
+
+jobs:
+  report:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [ 3.8 ]
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install packages
+        run: |
+          python -m pip install --upgrade pip wheel setuptools
+          python -m pip install -r requirements.txt
+          python -m pip install -r requirements/docs.txt
+          python -m pip install .
+          python -m pip list
+
+      - name: Build
+        run: make -C docs/ html
+
+      - name: Deploy
+        uses: JamesIves/github-pages-deploy-action@4.1.2
+        with:
+          branch: gh-pages # The branch the action should deploy to.
+          folder: docs/_build/html # The folder the action should deploy.