small config clean up

main.py

@@ -7,11 +7,12 @@ app = Flask(__name__)
 
 # ----- Config -----
 DB_PATH  = os.environ.get("SPLITBUDDY_DB", "splitbuddy.db")
-CURRENCY = "₪"
+CURRENCY = os.environ.get("SPLITBUDDY_CURRENCY", "₪")
 PERSON_A = os.environ.get("SPLITBUDDY_ME", "Me")        # you
 PERSON_B = os.environ.get("SPLITBUDDY_ROOMIE", "Idan")  # roommate
-DEFAULT_A_SHARE_PCT = 66.6667  # <-- you pay 2/3 by default
 DEFAULT_ACTOR = os.environ.get("SPLITBUDDY_ACTOR", "anon")  # who is using this device (optional)
+DEFAULT_A_SHARE_PCT = os.environ.get("SPLITBUDDY_DEFAULT_A_SHARE_PCT", 66.6667)  # <-- you pay 2/3 by default
+WEBAPP_PORT = os.environ.get("SPLITBUDDY_WEBAPP_PORT", 42069)
 
 # ----- DB helpers -----
 def get_db() -> sqlite3.Connection:
@@ -396,4 +397,4 @@ if __name__ == "__main__":
     os.makedirs(os.path.dirname(DB_PATH) or ".", exist_ok=True)
     with app.app_context():
         init_db()
-    app.run(debug=True)
+    app.run(debug=True, port=WEBAPP_PORT)