Update Dockerfile

Dockerfile

@@ -7,8 +7,10 @@ RUN apt-get update && apt-get install -y \
     xz-utils \
     libsm6 \
     libxext6 \
+    libgl1-mesa-glx \
     && rm -rf /var/lib/apt/lists/*
 
+
 RUN wget https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-amd64-static.tar.xz \
     && tar -xJf ffmpeg-release-amd64-static.tar.xz \
     && cp ffmpeg-*-amd64-static/ffmpeg /usr/local/bin/ \