Update Dockerfile

Dockerfile

@@ -1,6 +1,6 @@
 FROM node:latest
 
-RUN apt-get update && apt-get install -y chromium libnss3-dev && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y chromium libnss3-dev ffmpeg && rm -rf /var/lib/apt/lists/*
 
 ENV CHROME_BIN=/usr/bin/chromium
 
@@ -14,4 +14,4 @@ COPY . .
 
 EXPOSE 7860
 
-CMD ["node", "index.js"]
+CMD ["node", "index.js"]