Land rapid7#8424, change postgres docker image to alpine and add timezone

Author: Brent Cook

docker-compose.yml

@@ -13,9 +13,10 @@ services:
       - 4444:4444
     volumes:
       - $HOME/.msf4:/home/msf/.msf4
+      - /etc/localtime:/etc/localtime:ro
 
   db:
-    image: postgres:9.6
+    image: postgres:9-alpine
     volumes:
       - pg_data:/var/lib/postgresql/data