feat: backend service

integration/testenv/docker_host.go

@@ -0,0 +1,16 @@
+package testenv
+
+// DockerSocketPath returns the bind-mountable filesystem path of the
+// Docker daemon socket reachable from a container running on the
+// same daemon.
+//
+// testcontainers's `ExtractDockerSocket` returns the path on the
+// machine that is *running tests* — on macOS+Colima that is the
+// Colima-managed path under `~/.colima/...`, which does not resolve
+// inside the Linux VM. For bind mounts into other containers we need
+// the path the daemon itself sees, which on every supported daemon
+// (native Linux, Docker Desktop, Colima, Rancher) is the canonical
+// `/var/run/docker.sock`.
+func DockerSocketPath() string {
+	return "/var/run/docker.sock"
+}