Fix: Disable PTB signal handling for thread safety and enable unbuffered logs

Dockerfile

@@ -3,6 +3,9 @@ FROM python:3.9
 # Set working directory
 WORKDIR /app
 
+# Ensure logs are visible immediately
+ENV PYTHONUNBUFFERED=1
+
 # Install system dependencies (including ca-certificates explicitly)
 RUN apt-get update && apt-get install -y --no-install-recommends \
     gcc \

bot.py

@@ -494,7 +494,8 @@ def main():
     
     # Start the bot
     logger.info("Starting bot...")
-    application.run_polling(allowed_updates=Update.ALL_TYPES)
+    # Disable signal handling because we run in a thread in app.py
+    application.run_polling(allowed_updates=Update.ALL_TYPES, stop_signals=None)
 
 
 if __name__ == "__main__":