refactor: Use relative paths for data directories

app/app.py

@@ -58,7 +58,7 @@ FRONTEND_DIR = os.path.join(os.path.dirname(os.path.dirname(__file__)), "fronten
 app.mount("/static", StaticFiles(directory=FRONTEND_DIR), name="static")
 
 # Chunk upload storage
-CHUNK_ROOT = "/data/chunks"
+CHUNK_ROOT = "./data/chunks"
 try:
     os.makedirs(CHUNK_ROOT, exist_ok=True)
 except Exception:
@@ -228,7 +228,7 @@ def get_or_create_album_dir(album_name: str) -> str:
     if not album_name or not isinstance(album_name, str):
         album_name = "public"
     safe_album_name = sanitize_filename(album_name)
-    save_dir = os.path.join("/data/uploads", safe_album_name)
+    save_dir = os.path.join("./data/uploads", safe_album_name)
     os.makedirs(save_dir, exist_ok=True)
     return save_dir
 
@@ -889,7 +889,7 @@ async def api_albums(request: Request) -> JSONResponse:
     if not request.session.get("accessToken"):
         return JSONResponse({"error": "unauthorized"}, status_code=401)
     
-    upload_root = "/data/uploads"
+    upload_root = "./data/uploads"
     try:
         os.makedirs(upload_root, exist_ok=True)
         # also make public dir