Add env configuration for lurker.vibe

.env.sample

@@ -1,2 +1,6 @@
+# lurker.vibe
+API_URL="https://localhost/api/presences"
+API_TOKEN="Bearer token"
+
 # dbmate
 DATABASE_URL=""

lurker/bot.py

@@ -1,3 +1,4 @@
+import os
 import sys
 import typing
 from datetime import datetime
@@ -10,8 +11,8 @@ from loguru import logger
 T = typing.TypeVar("T")
 FlushFunc = typing.Callable[[list[T]], typing.Coroutine[typing.Any, typing.Any, bool]]
 
-API_URL = "https://requestbin.io/17ifjd71"
-API_TOKEN = ""
+API_URL = os.getenv("API_URL")
+API_TOKEN = os.getenv("API_TOKEN")
 
 
 class SpotifyRecord(typing.NamedTuple):
@@ -105,6 +106,10 @@ def main(argv: typing.Sequence[str]):
         print("Usage: lurker.py <token>")
         return 1
 
+    if not API_URL:
+        print("Missing `API_URL` environment variable.")
+        return 1
+
     Bot().run(argv[0])
     return 0