Cannot use bare slash "/" as root_path in a Fast-API app. (#255)

* Cannot use bare slash "/" as root_path in a Fast-API app.

* Update initial request to /catalogs

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Co-authored-by: david <dcchabgood@gmail.com>

function_app.py

@@ -16,8 +16,11 @@
 
 # This is the base URL path that Prez routes will stem from
 # must _start_ in a slash, but _not end_ in slash, eg: /prez
-env_root_path: str = os.getenv("FUNCTION_APP_ROOT_PATH", "/")
+env_root_path: str = os.getenv("FUNCTION_APP_ROOT_PATH", "")
 ROOT_PATH: str = env_root_path.strip()
+# Note, must be _empty_ string for no path prefix (not "/")
+if ROOT_PATH == "/":
+    ROOT_PATH = ""
 env_auth_level: str = os.getenv("FUNCTION_APP_AUTH_LEVEL", "FUNCTION")
 env_auth_level = env_auth_level.strip().upper()
 if env_auth_level == "ADMIN":
@@ -35,7 +38,7 @@
     from azure.functions import HttpRequest, Context
     import asyncio
 
-    req = HttpRequest("GET", "/v", headers={}, body=b"")
+    req = HttpRequest("GET", "/catalogs", headers={}, body=b"")
     context = dict()
     loop = asyncio.get_event_loop()