replaces hardcoded values with env var

app.py

@@ -1,10 +1,41 @@
+import os
 from flask import Flask, render_template
 
 app = Flask(__name__)
 
+def parse_time(value, default):
+    try:
+        hour, minute = map(int, value.split(":"))
+        return {"hour": hour, "minute": minute}
+    except Exception:
+        return default
+
 @app.route("/")
 def index():
-    return render_template("index.html")
+    start_time = parse_time(
+        os.getenv("WORK_START_TIME", "07:00"),
+        {"hour": 7, "minute": 0}
+    )
+    end_time = parse_time(
+        os.getenv("WORK_END_TIME", "17:30"),
+        {"hour": 17, "minute": 30}
+    )
+
+    work_days = [
+        int(d.strip())
+        for d in os.getenv("WORK_DAYS", "0,1,2,3").split(",")
+        if d.strip().isdigit()
+    ]
+
+    update_interval = int(os.getenv("UPDATE_INTERVAL_MS", "60000"))
+
+    return render_template(
+        "index.html",
+        work_start=start_time,
+        work_end=end_time,
+        work_days=work_days,
+        update_interval=update_interval
+    )
 
 if __name__ == "__main__":
-    app.run(host="0.0.0.0", port=5000, debug=True)
+    app.run(host="0.0.0.0", port=5000)