Add github actions workflow to run sphinx-build for checking

.github/workflows/pull-request-links.yaml

@@ -1,14 +1,14 @@
 # .github/workflows/pull-request-links.yaml
 
 name: readthedocs/actions
-on:
-  pull_request_target:
-    types:
-      - opened
-    # Execute this action only on PRs that touch
-    # documentation files.
-    # paths:
-    #   - "docs/**"
+on: [workflow_dispatch]
+#pull_request_target:
+#  types:
+#    - opened
+#  # Execute this action only on PRs that touch
+#  # documentation files.
+#  # paths:
+#  #   - "docs/**"
 
 permissions:
   pull-requests: write

.github/workflows/sphinx-build.yaml

@@ -0,0 +1,28 @@
+name: build
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-python@v2
+      with:
+        python-version: 3.9 
+    - name: Install Requirements
+      run: |
+        pip install --upgrade pip 
+        pip install -r requirements.txt
+    - name: Sphinx build - html
+      run: |
+        make html
+    - name: Sphinx build - pdf
+      run: |
+        apt install -y latexmk texlive-latex-extra
+        make latexpdf
+    - name: Sphinx build - epub
+      run: |
+        make epub