Fix missing docker-compose (#2899)

Fix missing `docker-compose` command if only `docker compose` (note
space) is available.

langchain/server.py

@@ -1,4 +1,5 @@
 """Script to run langchain-server locally using docker-compose."""
+import shutil
 import subprocess
 from pathlib import Path
 
@@ -6,8 +7,14 @@ from pathlib import Path
 def main() -> None:
     """Run the langchain server locally."""
     p = Path(__file__).absolute().parent / "docker-compose.yaml"
-    subprocess.run(["docker-compose", "-f", str(p), "pull"])
-    subprocess.run(["docker-compose", "-f", str(p), "up"])
+
+    if shutil.which("docker-compose") is None:
+        docker_compose_command = ["docker", "compose"]
+    else:
+        docker_compose_command = ["docker-compose"]
+
+    subprocess.run([*docker_compose_command, "-f", str(p), "pull"])
+    subprocess.run([*docker_compose_command, "-f", str(p), "up"])
 
 
 if __name__ == "__main__":