Build + Push cov-diff curing CI runs

CI currently spends 30s building this every run

Author: ryder-gillen-ltk

.github/workflows/integration.yaml

@@ -2,15 +2,63 @@ name: Integration Test
 
 on:
   pull_request:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+env:
+  AWS_DEFAULT_REGION: us-east-1
 
 jobs:
   build:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write
+
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
+      - name: Configure AWS credentials
+        if: github.event_name != 'pull_request'
+        uses: aws-actions/configure-aws-credentials@v4
+        with:
+          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+          aws-region: ${{ env.AWS_DEFAULT_REGION }}
+
+      - name: Login to Amazon ECR
+        if: github.event_name != 'pull_request'
+        id: login-ecr
+        uses: aws-actions/amazon-ecr-login@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Determine ECR image tags
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ steps.login-ecr.outputs.registry }}/cov-diff-action
+          tags: |
+            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', github.event.repository.default_branch) }}
+            type=sha
+            type=semver,pattern=v{{version}},event=tag
+
+      - name: Build and Push Docker image to ECR
+        id: build_and_push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./Dockerfile
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          cache-from: type=gha,scope=${{ github.workflow }}
+          cache-to: type=gha,mode=max,scope=${{ github.workflow }}
+
       - name: run tests
         run: |
           go test ./... -coverprofile=coverage.out