Use a single workflow file

The `sass-embedded` cannot be installed when using the `jekyll/builder` Docker container

Author: parkerbxyz

.github/workflows/jekyll-docker.yml

@@ -4,6 +4,9 @@ on:
 # Runs on pushes targeting the default branch
 push:
 branches: ["main"]
+# Runs on pull requests targeting the default branch
+pull_request:
+branches: [ "main" ]
 
 # Allows us to run this workflow manually from the Actions tab
 workflow_dispatch:
@@ -40,7 +43,13 @@ jobs:
  - name: Set up Pages
 id: pages
 uses: actions/configure-pages@v2
+ - name: Build and test with Rake
+# Only run in pull requests
+if: github.event_name == 'pull_request'
+run: bundle exec rake
  - name: Build with Jekyll
+# Only run on pushes or manual runs
+if: github.event_name == 'push' || github.event_name == 'workflow_dispatch'
 # Outputs to the './_site' directory by default
 run: bundle exec jekyll build --baseurl "${{steps.pages.outputs.base_path }}"
 env:
@@ -51,6 +60,8 @@ jobs:
 
 # Deployment job
 deploy:
+# Only run on pushes or manual runs
+if: github.event_name == 'push' || github.event_name == 'workflow_dispatch'
 environment:
 name: github-pages
 url: ${{steps.deployment.outputs.page_url }}