allow to disable checking for the latest package version via env (#4407)

reflex/config.py

@@ -547,6 +547,9 @@ class EnvironmentVariables:
     # Where to save screenshots when tests fail.
     SCREENSHOT_DIR: EnvVar[Optional[Path]] = env_var(None)
 
+    # Whether to check for outdated package versions.
+    REFLEX_CHECK_LATEST_VERSION: EnvVar[bool] = env_var(True)
+
 
 environment = EnvironmentVariables()
 

reflex/utils/prerequisites.py

@@ -93,6 +93,8 @@ def check_latest_package_version(package_name: str):
     Args:
         package_name: The name of the package.
     """
+    if environment.REFLEX_CHECK_LATEST_VERSION.get() is False:
+        return
     try:
         # Get the latest version from PyPI
         current_version = importlib.metadata.version(package_name)