Docker build & push (#2)

* Simple docker build and push
* Removed requirement of defining in the config.toml file, everything should be available from the environment
* Added workflow dispatch

.github/workflows/docker-build.yml

@@ -1,4 +1,4 @@
-name: Hello World Workflow
+name: Build and Push Docker images
 
 on:
   workflow_dispatch:
@@ -10,8 +10,57 @@ on:
       - master
 
 jobs:
-  say-hello:
+  build:
     runs-on: ubuntu-latest
+
     steps:
-      - name: Say Hello World
-        run: echo "Hello, World!"
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Log in to Docker Hub
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Build frontend Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: app.dockerfile
+          push: false
+          tags: ${{ secrets.DOCKER_USERNAME }}/perplexica-frontend:latest
+
+      - name: Build backend Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: backend.dockerfile
+          push: false
+          tags: ${{ secrets.DOCKER_USERNAME }}/perplexica-backend:latest
+
+      - name: Push frontend Docker image
+        if: github.event_name != 'pull_request'
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: app.dockerfile
+          push: true
+          tags: ${{ secrets.DOCKER_USERNAME }}/perplexica-frontend:latest
+
+      - name: Push backend Docker image
+        if: github.event_name != 'pull_request'
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: backend.dockerfile
+          push: true
+          tags: ${{ secrets.DOCKER_USERNAME }}/perplexica-backend:latest
+
+      - name: Log out from Docker Hub
+        if: github.event_name != 'pull_request'
+        run: docker logout