Add docker

Dockerfile

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+FROM python:slim
+ENV DEBIAN_FRONTEND noninteractive
+
+EXPOSE 8181
+
+RUN apt update && \
+    apt install -y opus-tools ffmpeg libmagic-dev curl tar && \
+    rm -rf /var/lib/apt/lists/*
+
+COPY . /botamusique
+
+WORKDIR /botamusique
+
+RUN rm -rf .git*
+
+RUN python3 -m venv venv && \
+    venv/bin/pip install wheel && \
+    venv/bin/pip install -r requirements.txt
+
+RUN chmod +x entrypoint.sh
+
+ENTRYPOINT [ "/botamusique/entrypoint.sh" ]
+CMD ["venv/bin/python", "mumbleBot.py"]