nohip fix

Makefile

@@ -1,11 +1,14 @@
 all: run
 
 run:
-	nohup .venv/bin/python app.py > output.log 2>&1 & echo $! > app.pid
+	nohup python app.py > output.log 2>&1 & echo $$! > app.pid
 
 stop:
-	kill -9 $(cat app.pid) || true
-	rm -f app.pid
+	@if [ -s app.pid ]; then \
+		kill -9 $$(cat app.pid) && rm -f app.pid; \
+	else \
+		echo "No running process found."; \
+	fi
 
 restart: stop run
 
@@ -13,5 +16,4 @@ logs:
 	tail -f output.log
 
 clean: stop
-	rm -f output.log
-
+	rm -f output.log app.pid