feat: implement CI/CD workflows for Docker image build and deployment

.gitea/workflows/build-push.yml

@@ -0,0 +1,57 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: 'Docker image tag (e.g., v1.0.0, latest)'
+        required: false
+        default: 'latest'
+      push_to_registry:
+        description: 'Push to registry?'
+        required: false
+        default: 'true'
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    container:
+      image: catthehacker/ubuntu:act-latest
+    
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to Docker Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ secrets.DOCKER_REGISTRY_URL }}
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: ${{ secrets.DOCKER_REGISTRY_URL }}/slipmatz-web
+          tags: |
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+            type=raw,value=latest
+
+      - name: Build and push
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=registry,ref=${{ secrets.DOCKER_REGISTRY_URL }}/slipmatz-web:buildcache
+          cache-to: type=registry,ref=${{ secrets.DOCKER_REGISTRY_URL }}/slipmatz-web:buildcache,mode=max