Merge pull request 'add git repo in docker-compose' (#1) from docker into master

Reviewed-on: agenda/docker#1

docker-compose.yml

@@ -6,9 +6,7 @@ services:
     image: redis/redis-stack-server:latest
 
   backend:
-    build:
-      context: ../backend-collector
-      dockerfile: Dockerfile
+    build: https://git.valczeryba.ovh/agenda/backend-collector.git
     depends_on:
       - redis
     env_file: