Update Dockerfile (added ffmpeg) (#451)

docker/Dockerfile

@@ -13,7 +13,7 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update && \
         libgcc1 libglib2.0-0 libgtk-3-0 libnspr4 libpango-1.0-0 libx11-6 libx11-xcb1 libxcb1 \
         libxcomposite1 libxcursor1 libxdamage1 libxext6 libxfixes3 libxi6 libxrandr2 libxrender1 \
         libxss1 libxtst6 ca-certificates fonts-liberation libappindicator1 libnss3 lsb-release \
-        xdg-utils git build-essential && \
+        xdg-utils git build-essential ffmpeg && \
     mkdir -p /etc/apt/keyrings && \
     curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg && \
     echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_18.x nodistro main" | tee /etc/apt/sources.list.d/nodesource.list && \
@@ -92,4 +92,4 @@ HEALTHCHECK --interval=1m --timeout=10s --start-period=1m \
   CMD /bin/bash /usr/local/bin/docker-healthcheck.sh || exit 1
 
 # Run the server
-ENTRYPOINT ["/bin/bash", "/usr/local/bin/docker-entrypoint.sh"]
+ENTRYPOINT ["/bin/bash", "/usr/local/bin/docker-entrypoint.sh"]
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