Seperate Docker network.

Seperate the runner and jobs to a network just for themselves.

docker-compose.yml

@@ -7,6 +7,7 @@ services:
     environment:
       CI_SERVER_URL: "${CI_SERVER_URL:-https://git.shore.co.il}"
       DOCKER_IMAGE: docker:19.03
+      DOCKER_NETWORK_MODE: &network gitlab-runner
       REGISTRATION_TOKEN: "${REGISTRATION_TOKEN}"
       RUNNER_NAME: "${RUNNER_NAME}"
       REGISTER_RUN_UNTAGGED: "${RUN_UNTAGGED:-true}"
@@ -29,4 +30,4 @@ volumes:
 
 networks:
   default:
-    name: shore
+    name: *network