feat: implement ssh forwarding

internal/docker/docker.go

@@ -0,0 +1,21 @@
+package docker
+
+import (
+	"context"
+	"github.com/docker/docker/api/types"
+	"github.com/docker/go-connections/nat"
+	"strconv"
+)
+
+// ContainerSSHHostPort returns the port on the host that is exposing the internal ssh port of the given container info
+func ContainerSSHHostPort(ctx context.Context, container types.ContainerJSON) int {
+	ports := container.NetworkSettings.Ports[nat.Port("22/tcp")]
+	if len(ports) == 0 {
+		return -1
+	}
+	port, err := strconv.Atoi(ports[0].HostPort)
+	if err != nil {
+		return -1
+	}
+	return port
+}