How to use gitlab-runner exec docker correclty

I am trying to run the gitlab pipeline jobs locally in order to test and debug.
Here is what I did

  1. Installed gitlab-runner on my local machine.
  2. sudo gitlab-runner exec docker --docker-privileged --builds-dir /tmp/builds --docker-volumes /home/fox/Work/docker/core-application:/core-application Rspec

This gives

Runtime platform arch=amd64 os=linux pid=632331 revision=8fa89735 version=13.6.0
Running with gitlab-runner 13.6.0 (8fa89735)
Preparing the "docker" executor
Using Docker executor with image docker:19.03.6 ...
Starting service docker:19.03.6-dind ...
Pulling docker image docker:19.03.6-dind ...
Using docker image sha256:a33335bfe8302f4d8a7688bc1fa539f2aba787ec724119be53adc4681702a3e7 for docker:19.03.6-dind with digest docker@sha256:a4f33d003b7ec9133c2a1ff61f4e80305b329c0fa8b753140b9ab2808f28328c ...
WARNING: Service docker:19.03.6-dind is already created. Ignoring.
Waiting for services to be up and running...

*** WARNING: Service runner--project-0-concurrent-0-aef5122f9d27e6f0-docker-0 probably didn't start properly.

Health check error:
service "runner--project-0-concurrent-0-aef5122f9d27e6f0-docker-0-wait-for-service" timeout

Health check container logs:

Pulling docker image docker:19.03.6 ...
Using docker image sha256:6512892b576811235f68a6dcd5fbe10b387ac0ba3709aeaf80cd5cfcecb387c7 for docker:19.03.6 with digest docker@sha256:3eb67443c54436650bd4f1e97ddf9ab1797d75e15d685c791f6c6397edaa6d82 ...
Preparing environment
Running on runner--project-0-concurrent-0 via fox...
Getting source from Git repository
Fetching changes...
Initialized empty Git repository in /tmp/builds/project-0/.git/
Created fresh repository.
fatal: not a git repository: /home/fox/Work/docker/core-application/../.git/modules/core-application
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
ERROR: Failed to cleanup volumes
ERROR: Job failed: exit code 1
FATAL: exit code 1