Adopt Compose v2 (#240)

* Adopt Compose v2

Signed-off-by: Nicolas De Loof <nicolas.deloof@gmail.com>

traefik-golang/compose.yaml

@@ -0,0 +1,18 @@
+services:
+  frontend:
+    image: traefik:2.2
+    command: --providers.docker --entrypoints.web.address=:80 --providers.docker.exposedbydefault=false
+    ports:
+      # The HTTP port
+      - "80:80"
+    volumes:
+      # So that Traefik can listen to the Docker events
+      - /var/run/docker.sock:/var/run/docker.sock
+    depends_on:
+      - backend
+  backend:
+    build: backend
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.routers.go.rule=Path(`/`)"
+      - "traefik.http.services.go.loadbalancer.server.port=80"