use alpine-based official images

diff --git a/docker-compose.yml b/docker-compose.yml
index e6002eaa5e3a5a3d78db9c4788614a08cd4d2b64..68c8ef960e34d288e03401230a2404b1cf326ae9 100644 (file)
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -2,10 +2,10 @@ version: '2'
 services:
   db:
     restart: always
-    image: postgres
+    image: postgres:alpine
   redis:
     restart: always
-    image: redis
+    image: redis:alpine
   web:
     restart: always
     build: .