put music path in env-able variable

app.py

@@ -2,11 +2,10 @@ from flask import Flask, render_template, request, send_file, Response
 import os
 import subprocess
 import signal
+from pathlib import Path
 
+music_path = Path(os.environ.get("MUSIC_PATH", "./music"))
 mpv_process: subprocess.Popen | None = None
-if not os.path.exists("music"):
-    os.mkdir("music")
-
 app = Flask(__name__)
 
 
@@ -27,7 +26,7 @@ def playback_start():
             "mpv",
             "--input-ipc-server=/tmp/mpvsocket",
             "--shuffle",
-            "music",
+            str(music_path),
             "--no-video",
         ]
     )
@@ -80,7 +79,7 @@ def route_toggle():
 @app.route("/files/<path:path>", methods=["GET"])
 @app.route("/files")
 def filemgr(path=""):
-    full_path = os.path.join("music", path)
+    full_path = music_path.joinpath(path)
     print(full_path)
     if os.path.isfile(full_path):
         return send_file(full_path)
@@ -124,6 +123,9 @@ def api_status():
 signal.signal(signal.SIGTERM, sigh)
 signal.signal(signal.SIGINT, sigh)
 
+if not music_path.exists():
+    music_path.mkdir()
+
 if __name__ == "__main__":
     try:
         app.run(host="0.0.0.0", port=1337)