feat: add devnet build workflow

.github/workflows/devnet-build.yml

@@ -0,0 +1,38 @@
+name: Devnet Build
+
+on:
+    pull_request:
+      types: [closed]
+
+env:
+    AWS_REGION: ${{ vars.AWS_REGION }}
+    REPO_URL: ${{ vars.ECR_REPO_URL }}
+    AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
+    AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+
+jobs:
+    build:
+        if: github.event.pull_request.merged == true && contains(github.event.pull_request.labels.*.name, 'CI:Deploy')
+        runs-on: ubuntu-latest
+        
+        steps:
+        - name: Checkout code
+          uses: actions/checkout@v3
+
+        - name: Setup AWS CLI credentials
+          uses: aws-actions/configure-aws-credentials@v4
+          with:
+            aws-access-key-id: ${{ env.AWS_ACCESS_KEY_ID }}
+            aws-secret-access-key: ${{ env.AWS_SECRET_ACCESS_KEY }}
+            aws-region: ${{ env.AWS_REGION }}
+
+        - name: Login to Amazon ECR
+          run: aws ecr get-login-password --region ${{ env.AWS_REGION }} | docker login --username AWS --password-stdin ${{ env.REPO_URL }}
+        
+        - name: Build and push Docker image
+          uses: docker/build-push-action@v5
+          with:
+            context: .
+            file: Dockerfile.devnet
+            push: true
+            tags: ${{ env.REPO_URL }}/limechain/devnet:latest

.github/workflows/geth-build.yml

@@ -1,4 +1,4 @@
-name: Docker Build
+name: Geth Build
 
 on:
   pull_request: