ci: add docker build step and auto-generate image tag from dapp version

Author: SeddikBellamine

.github/workflows/dapp-deploy.yml

@@ -10,11 +10,6 @@ on:
         options:
           - dapp-dev
           - dapp-prod
-      image-tag:
-        description: 'Tag for the dapp image to sconify'
-        required: true
-        type: string
-        default: 'latest'
       sconify-version:
         description: 'Version of the sconify image to use'
         type: string
@@ -24,11 +19,50 @@ env:
   DEPLOY_ENVIRONMENT: ${{ inputs.environment }}
 
 jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    outputs:
+      image-name: ${{ steps.build.outputs.image-name }}
+      image-tag: ${{ steps.build.outputs.image-tag }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_PAT }}
+
+      - name: Get dapp version
+        id: version
+        run: |
+          VERSION=$(node -p "require('./dapp/package.json').version")
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+          echo "dapp-version=$VERSION"
+
+      - name: Build and push Docker image
+        id: build
+        uses: docker/build-push-action@v5
+        with:
+          context: ./dapp
+          push: true
+          tags: ${{ secrets.DOCKERHUB_USERNAME }}/product/web3telegram-dapp:${{ steps.version.outputs.version }}-non-tee
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+        outputs:
+          image-name: ${{ secrets.DOCKERHUB_USERNAME }}/product/web3telegram-dapp
+          image-tag: ${{ steps.version.outputs.version }}-non-tee
+
   sconify:
+    needs: build-and-push
     uses: iExecBlockchainComputing/github-actions-workflows/.github/workflows/sconify.yml@sconify-v2
     with:
-      image-name: product/web3telegram-dapp
-      image-tag: ${{ inputs.image-tag }}
+      image-name: ${{ needs.build-and-push.outputs.image-name }}
+      image-tag: ${{ needs.build-and-push.outputs.image-tag }}
       sconify-debug: false
       sconify-prod: true
       docker-registry: docker.io
@@ -70,7 +104,7 @@ jobs:
 
   deploy-dapp:
     runs-on: ubuntu-latest
-    needs: sconify
+    needs: [build-and-push, sconify]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4