add code deploy app spec and deployment script

appspec.yaml

@@ -0,0 +1,10 @@
+version: 0.0
+os: linux
+files:
+  - source: /
+    destination: /opt/kv-store
+hooks:
+  ApplicationStart:
+    - location: scripts/deploy.sh
+      timeout: 300
+runas: root

scripts/deploy.sh

@@ -0,0 +1,18 @@
+# !/bin/bash
+for container_id in `docker ps --format "table {{.ID}}  {{.Names}}  {{.CreatedAt}}" | grep web | awk -F  "  " '{print $1}'`
+do
+    container_ids+=($container_id)
+done
+docker-compose up -d --build --no-deps --scale web=2 --no-recreate server
+sleep 10
+for container_id in "${container_ids[@]}"
+do
+    docker kill -s SIGTERM $container_id
+done
+sleep 1
+for container_id in "${container_ids[@]}"
+do
+    docker rm -f $container_id
+done
+sleep 1
+docker-compose up -d --no-deps --scale web=1 --no-recreate server