condition to deploy upon PR

Author: cadenmyers13

.github/workflows/docs.yml

@@ -0,0 +1,49 @@
+name: Build Documentation
+
+on:
+  push:
+    branches:
+      - main
+  release:
+    
+  pull_request:
+    branches:
+        - main
+
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash -l {0}
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - uses: conda-incubator/setup-miniconda@v2
+        with:
+          activate-environment: build
+          auto-update-conda: true
+
+      - name: install requirements
+        run: >-
+          conda install -n build -c conda-forge 
+          --file requirements/build.txt
+          --file requirements/run.txt
+          --file requirements/docs.txt
+          --quiet --yes
+
+      - name: install the package
+        run: python -m pip install . --no-deps
+
+      - name: build documents
+        run: make -C doc/manual html
+
+      - name: Deploy
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./doc/manual/build/html