feat: Allow overriding uvicorn listen host with LISTEN_HOST env

Author: jinnatar

Diff for: README.md

@@ -9,13 +9,14 @@ You'll need poetry, or make a virtualenv and pip install the repo.
 ```shell
 git clone <repo url> && cd <repo name>
 poetry install
-poetry run uvicorn tailscale_webfinger:app
+poetry run tailscale-webfinger
 ```
 
 ## Environment vars
 
 - KANIDM_DOMAIN - the hostname of your Kanidm server
 - CLIENT_ID - the client ID of the Tailscale config on your Kanidm server
+- LISTEN_HOST - the host to listen to, defaults to `127.0.0.1`
 
 It'll respond with this if you have `idp.example.com`and `tailscale` respectively:
 

Diff for: tailscale_webfinger/__init__.py

@@ -14,7 +14,7 @@
 
 
 def uvicorn_run():
-    uvicorn.run("tailscale_webfinger:app")
+    uvicorn.run("tailscale_webfinger:app", host=os.getenv('LISTEN_HOST', '127.0.0.1'))
 
 
 @lru_cache()