compose: add healthcheck

docker-compose.yml

@@ -15,6 +15,13 @@ services:
     volumes:
       # So that traefik can listen to the Docker events
       - /var/run/docker.sock:/var/run/docker.sock:ro
+    healthcheck:
+      # DON'T
+      # test: "/usr/bin/wget -q -Y off http://localhost:80/about -O /dev/null > /dev/null 2>&1"
+      # DO:
+      test: "/usr/bin/wget -q -Y off http://localhost:80/about -O /dev/null 2>&-"
+      interval: 10s
+      retries: 20
 
   homepage:
     build: