Update Dockerfile

Dockerfile

@@ -1,8 +1,8 @@
 FROM python:3.9
 
-# Install OpenGL dependencies
+# Install OpenGL dependencies and Xvfb
 RUN apt-get update && \
-    apt-get install -y libgl1-mesa-glx libgl1-mesa-dev
+    apt-get install -y libgl1-mesa-glx libgl1-mesa-dev xvfb
 
 # Set the working directory in the container
 WORKDIR /app
@@ -13,5 +13,8 @@ COPY app.py .
 # Install the required Python dependencies
 RUN pip install pyglet arcade pygame
 
-# Run the app.py script when the container starts
-CMD ["python", "app.py"]
+# Set the display environment variable
+ENV DISPLAY=:99
+
+# Run Xvfb and the app.py script when the container starts
+CMD Xvfb :99 & python app.py