fix: Add psutil dependency to Dockerfile

Author: mrMigles

Dockerfile

@@ -7,8 +7,8 @@ ENV PYTHONUNBUFFERED=1 \
 
 COPY main.py .
 
-RUN python -m pip install --no-cache-dir python-telegram-bot==21.6
+RUN python -m pip install --no-cache-dir python-telegram-bot==21.6 psutil
 
 VOLUME ["/data"]
 
-CMD ["python", "main.py"]
+CMD ["python", "main.py"]