Dockerfile

FROM python:3.8

RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
    && apt-get -y install --no-install-recommends ffmpeg \
    && rm -rf /var/lib/apt/lists/*

COPY requirements.txt /tmp/pip-tmp/
RUN pip3 --disable-pip-version-check --no-cache-dir install -r /tmp/pip-tmp/requirements.txt \
    && rm -rf /tmp/pip-tmp

COPY src/ /app/

WORKDIR /app
RUN python app.py