Support docker

Dockerfile

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+FROM python:alpine as builder
+
+RUN apk update && apk add  --no-cache tzdata alpine-sdk libffi-dev ca-certificates
+ADD requirements.txt /tmp/
+RUN pip3 install --user -r /tmp/requirements.txt && rm /tmp/requirements.txt
+
+
+FROM python:alpine
+WORKDIR /smzdm_bot
+ENV TZ=Asia/Shanghai
+
+RUN apk update && apk add  --no-cache ffmpeg vnstat
+COPY --from=builder /root/.local /usr/local
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
+COPY . /smzdm_bot
+
+CMD ["python", "main.py"]