Integrate the client file into the compoe file

[refs #f34238344b71]

Author: jfahrer

developing/webapp/docker-compose.yml

@@ -23,3 +23,11 @@ services:
       - POSTGRES_DB=demo
     volumes:
       - ./sql/create_table.sql:/docker-entrypoint-initdb.d/create_table.sql
+
+  client:
+    image: jfahrer/checker-u-dev-a3:latest
+    environment:
+      - POSTGRES_USER=demo
+      - POSTGRES_PASSWORD=secret
+      - POSTGRES_DB=demo
+      - POSTGRES_HOST=pg