Add local CI job for ECR image pushes

.github/workflows/README.md

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+## Releasing Image to ECR
+
+### Prerequisites 
+
+- `act` - version >=0.2.71
+  - https://nektosact.com/installation/index.html
+- Logged in and authenticated to AWS
+
+### Copy Job
+At the root of the repo, run:
+
+```shell
+act -j 'release_to_ecr' --env=IMAGE_TAG=v0.1.2 --env=AWS_URL=aws.com --env-file <(aws configure export-credentials --format env)
+```
+Make sure to set:
+- `IMAGE_TAG` 
+  - The tag of what image you want to copy from Dockerhub to ECR
+- `AWS_URL`
+  - The URL to our AWS instance

.github/workflows/ecr-push.yaml

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+name: HMDA ECR Image Push
+
+
+jobs:
+  release_to_ecr:
+      name: Copy Docker image from Dockerhub to ECR
+      runs-on: ubuntu-latest
+      steps:
+        - name: Configure AWS credentials
+          uses: aws-actions/configure-aws-credentials@v4
+          with:
+            aws-access-key-id: ${{ env.AWS_ACCESS_KEY_ID }}
+            aws-secret-access-key: ${{ env.AWS_SECRET_ACCESS_KEY }}
+            aws-region: us-east-1
+
+        - name: Login to Amazon ECR
+          id: login-ecr
+          uses: aws-actions/amazon-ecr-login@v2
+
+        - name: Copy Image to ECR
+          run: |
+            docker pull hmda/hmda-platform:${{ env.IMAGE_TAG }}
+            docker tag hmda/hmda-platform:${{ env.IMAGE_TAG }} ${{ env.AWS_URL }}/hmda/hmda-platform:${{ env.IMAGE_TAG }}
+            docker push ${{ env.AWS_URL }}/hmda/hmda-platform:${{ env.IMAGE_TAG }}
+
+        - name: Cleanup images
+          run: |
+            docker rmi hmda/hmda-platform:${{ env.IMAGE_TAG }}
+            docker rmi ${{ env.AWS_URL }}/hmda/hmda-platform:${{ env.IMAGE_TAG }}