Create build_docs.yml as a test

Author: yck011522

.github/workflows/build_docs.yml

@@ -0,0 +1,34 @@
+name: build_docs
+
+on:
+  push:
+    branches:
+      - main
+      - 'compas-2.x-compat'
+  pull_request:
+    branches:
+      - main
+      - 'compas-2.x-compat'
+
+jobs:
+  build:
+    name: ubuntu-py38-build_docs
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install wheel
+          python -m pip install cython --config-settings="--build-option=--no-cython-compile"
+      - name: Install
+        run: |
+          python -m pip install --no-cache-dir -r requirements-dev.txt
+      - name: 📃 Generate docs
+        if: success()
+        run: |
+          invoke docs --check-links