feat!: add daemon to build & especially cache

gitlab-runner-example.toml

@@ -0,0 +1,21 @@
+[[runners]]
+    name = "Nix CI Runner"
+    url = "https://gitlab.com"
+    token = ""
+    executor = "docker"
+    [runners.custom_build_dir]
+    [runners.docker]
+        tls_verify = false
+        image = "technofab/nix-gitlab-ci"
+        privileged = true
+        # we cant specify a json file here, so we need privileged for now
+        #security_opt = [ "seccomp=/usr/share/containers/seccomp.json" ]
+        disable_entrypoint_overwrite = false
+        oom_kill_disable = false
+        disable_cache = false
+        volumes = [
+            # prefixed with the docker-compose name
+            "nix-gitlab-ci_nix-shared-store:/mnt/nix/store:ro",
+            "nix-gitlab-ci_nix-daemon-socket:/mnt/nix/daemon-socket:ro"
+        ]
+        shm_size = 0