Update setup.py to include gateway_publish.py

Author: Egor-S

setup.py

@@ -106,7 +106,7 @@ def get_long_description():
     package_dir={"": "cli"},
     packages=find_packages("cli"),
     package_data={
-        "dstack._internal": ["schemas/*.json", "scripts/*.sh"],
+        "dstack._internal": ["schemas/*.json", "scripts/*.sh", "scripts/*.py"],
         "dstack._internal.hub": [
             "statics/*",
             "statics/**/*",