Install ffmpeg in the discordbot

src/discordbot/Dockerfile

@@ -1,11 +1,16 @@
 FROM python:3-bookworm
 
+RUN apt-get update && apt-get install -y --no-install-recommends \
+ffmpeg \
+&& \
+apt-get clean && \
+rm -rf /var/lib/apt/lists/*
+
 WORKDIR /python-docker
 
 COPY requirements.txt requirements.txt
 RUN pip3 install -r requirements.txt
 
-
 COPY . .
 
 CMD ["python", "./discordbot.py"]