fix: install sdist works and cli too

langflow/__main__.py

@@ -11,6 +11,7 @@ def serve(
     workers: int = None,
     timeout: int = None,
 ):
+    app = create_app()
     # get the directory of the current file
     path = Path(__file__).parent
     static_files_dir = path / "frontend/build"
@@ -39,5 +40,4 @@ def main():
 
 
 if __name__ == "__main__":
-    app = create_app()
     main()

pyproject.toml

@@ -5,11 +5,13 @@ description = "A Python package with a built-in web application"
 authors = ["Ibis Prevedello <ibiscp@gmail.com>", "Gabriel Almeida <gabrielf.almeida90@gmail.com>","Otávio Anovazzi <otavio2204@gmail.com>"]
 packages = [
     { include = "langflow"},
-    { include = "langflow_backend", from = "langflow/backend"},
 ]
 include = ["langflow/frontend/build/*", "langflow/frontend/build/**/*"]
 exclude = ["langflow/frontend/node_modules/*", "langflow/frontend/src/*"]
 
+[tool.poetry.scripts]
+langflow = "langflow.__main__:main"
+
 
 [tool.poetry.group.dev.dependencies]
 ruff = "^0.0.254"
@@ -24,3 +26,4 @@ build-backend = "poetry.core.masonry.api"
 python = "^3.9"
 typer = "^0.7.0"
 gunicorn = "^20.1.0"
+langflow_backend = {path = "langflow/backend"}