Restart prod docker containers unless stopped

In production, we always want to run the docker containers unless we
explicitly ask them to stop.

Change-Id: I0676e05036c38c8bfbafda665373db263191ea73
diff --git a/docker-compose.yml b/docker-compose.yml
index db17206..ca974ad 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -11,6 +11,7 @@
       - server
     networks:
       - backend
+    restart: unless-stopped
   server:
     build:
       context: .
@@ -23,6 +24,7 @@
       - db
     networks:
       - backend
+    restart: unless-stopped
   db:
     image: mariadb
     environment:
@@ -30,6 +32,7 @@
       MARIADB_DATABASE: twpt
     networks:
       - backend
+    restart: unless-stopped
 
 networks:
   backend: