[CI] Add build workflow

Author: elacuesta

.github/workflows/build.yml

@@ -0,0 +1,40 @@
+name: Build
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build:
+
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        include:
+        - python-version: 3.7
+          env: TOXENV=docs
+        - python-version: 3.8
+          env: TOXENV=flake8
+        - python-version: 3.8
+          env: TOXENV=pylint
+        - python-version: 3.8
+          env: TOXENV=security
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Run check
+      env: ${{ matrix.env }}
+      run: |
+        pip install --upgrade pip
+        pip install --upgrade tox
+        tox