feat(docker): add prebuilt images

.github/workflows/docker-build.yaml

@@ -0,0 +1,46 @@
+name: Build & Push Docker Image
+
+on:
+  push:
+    branches:
+      - main
+  release:
+    types: [published]
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Log in to DockerHub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Extract version from release tag
+        if: github.event_name == 'release'
+        id: version
+        run: echo "RELEASE_VERSION=${GITHUB_REF#refs/tags/}" >> $GITHUB_ENV
+
+      - name: Build and push Docker image
+        if: github.ref == 'refs/heads/main' && github.event_name == 'push'
+        run: |
+          docker build -f backend.dockerfile -t itzcrazykns1337/perplexica-backend:main .
+          docker build -f app.dockerfile -t itzcrazykns1337/perplexica-frontend:main .
+          docker push itzcrazykns1337/perplexica-backend:main
+          docker push itzcrazykns1337/perplexica-frontend:main
+
+      - name: Build and push release Docker image
+        if: github.event_name == 'release'
+        run: |
+          docker build -f backend.dockerfile -t itzcrazykns1337/perplexica-backend:${{ env.RELEASE_VERSION }} .
+          docker build -f app.dockerfile -t itzcrazykns1337/perplexica-frontend:${{ env.RELEASE_VERSION }} .
+          docker push itzcrazykns1337/perplexica-backend:${{ env.RELEASE_VERSION }}
+          docker push itzcrazykns1337/perplexica-frontend:${{ env.RELEASE_VERSION }}