add build workflow

.github/workflows/build.yml

@@ -0,0 +1,33 @@
+# vim:sw=2:ts=2
+# build html version of docs
+name: build
+
+# on events
+on:
+  pull_request:
+    branches:
+      - master
+      - 'feature/*'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: build
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: sphinx-doc/github-problem-matcher@master
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.10"
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+
+      - name: Build docs
+        run: |
+          make clean html SPHINXOPTS="-W --keep-going -n"

requirements.txt

@@ -0,0 +1,5 @@
+sphinx==7.2.6
+sphinx_copybutton==0.5.2
+myst-parser==2.0.0
+furo==2024.1.29
+pygments==2.17.2