Add Docker CI workflow for automated image build and deployment

Author: mrepol742

.github/workflows/docker.yml

@@ -0,0 +1,42 @@
+name: Docker CI
+
+on:
+  push:
+    branches: ["master"]
+  workflow_dispatch:
+
+jobs:
+  docker:
+    runs-on: 'ubuntu-latest'
+    
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v4
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.APP_DOCKER_USERNAME }}
+          password: ${{ secrets.APP_DOCKER_PASSWORD }}
+
+      - name: Build Docker image
+        run: |
+          docker build -t mrepol742/phpspa-example:latest .
+
+      - name: Push Docker image
+        run: |
+          docker push mrepol742/phpspa-example:latest
+
+      - name: Run Docker container
+        run: |
+          docker run -d -p 8080:80 --name phpspa-example mrepol742/phpspa-example:latest
+
+      - name: Check container logs
+        run: |
+          docker logs phpspa-example
+
+      - name: Stop and remove container
+        if: always()
+        run: |
+          docker stop phpspa-example
+          docker rm phpspa-example