Set default for HOST_NAME to localhost

So far, the host name was obtained via `socket.getfqdn()` but this
resulted in a strange host name (with very many zeros) and problems on
macOs (always macOS).

pyproject.toml

@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "qlever"
 description = "Script for using the QLever SPARQL engine."
-version = "0.5.2"
+version = "0.5.6"
 authors = [
     { name = "Hannah Bast", email = "[email protected]" }
 ]

src/qlever/qleverfile.py

@@ -106,7 +106,7 @@ def arg(*args, **kwargs):
                 help="The binary for starting the server (this requires "
                      "that you have compiled QLever on your machine)")
         server_args["host_name"] = arg(
-                "--host-name", type=str, default=f"{socket.getfqdn()}",
+                "--host-name", type=str, default=f"localhost",
                 help="The name of the host on which the server listens for "
                      "requests")
         server_args["port"] = arg(