Update Dockerfile

Dockerfile

@@ -11,6 +11,7 @@ RUN pip install --no-cache-dir -r requirements.txt
 # Copy the rest of the app
 COPY app.py image_fetcher.py video.py ./
 RUN apt-get update && apt-get install -y ffmpeg
+RUN apt-get update && apt-get install -y fonts-liberation
 
 # Expose port 5000 (Flask default)
 EXPOSE 7860