Adding CD to geth (ethereum#11)

* Adding CD to geth

.github/scripts/stop-ecs-task.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+if [ "$#" -ne 2 ]; then
+    echo "Invalid number of arguments. Usage: stop-ecs-task.sh <cluster> <service>"
+    exit 1
+fi
+
+cluster=$1
+service=$2
+
+tasks=$(aws ecs list-tasks --cluster $cluster --service-name $service)
+
+task_arn=$(echo $tasks | awk -F\[ '{print $2}' | awk -F\" '{print $2}')
+
+if [ -n "${task_arn}" ]; then
+  aws ecs stop-task --cluster $cluster --task $task_arn > /dev/null
+fi

.github/workflows/dev-ecr-deploy.yml

@@ -0,0 +1,50 @@
+name: Build & Tag Container, Push to ECR, Deploy to Dev
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build:
+    name: Build, Tag & push to ECR, Deploy task
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup golang
+        uses: actions/setup-go@v2
+        with:
+          go-version: '1.14.2'
+
+      - name: Install & Build
+        run: make all
+
+      - name: Configure AWS Credentials
+        uses: aws-actions/configure-aws-credentials@v1
+        with:
+          aws-access-key-id: ${{ secrets.AWS_CI_USER_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.AWS_CI_USER_SECRET_ACCESS_KEY }}
+          aws-region: us-east-2
+
+      - name: Login to Amazon ECR
+        id: login-ecr
+        uses: aws-actions/amazon-ecr-login@v1
+
+      - name: Build, tag, and push image to Amazon ECR
+        env:
+          ECR_REGISTRY: ${{ steps.login-ecr.outputs.registry }}
+          ECR_REPOSITORY: optimism/geth
+          IMAGE_TAG: latest
+        run: |
+          docker build -t $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG .
+          docker push $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG
+
+# TODO: Add this when the DEV env is set up
+#      - name: Stop existing dev-geth ECS task to auto-start task with new image
+#        run: |
+#          ./.github/scripts/stop-ecs-task.sh dev-geth geth
+
+      - name: Logout of Amazon ECR
+        if: always()
+        run: docker logout ${{ steps.login-ecr.outputs.registry }}