chore: 优化 dockerfile，缩小镜像体积

Dockerfile

@@ -1,29 +1,41 @@
-FROM python:3.11.7-alpine3.19
+FROM python:3.11.7-alpine3.19 as base
 
 WORKDIR /app
 
 ENV LANG=zh_CN.UTF-8 \
     TZ=Asia/Shanghai \
     BILI_IN_DOCKER=true
 
-COPY poetry.lock pyproject.toml ./
-
 RUN apk add --no-cache ffmpeg tini \
     && apk add --no-cache --virtual .build-deps \
         gcc \
         musl-dev \
         libffi-dev \
         openssl-dev \
-    && pip install poetry \
-    && poetry config virtualenvs.create false \
+    && pip install poetry==1.7.1 pip3-autoremove==1.2.0
+
+COPY poetry.lock pyproject.toml ./
+
+RUN poetry config virtualenvs.create false \
     && poetry install --only main --no-root \
+    && pip3-autoremove -y poetry pip3-autoremove \
     && apk del .build-deps \
     && rm -rf \
         /root/.cache \
         /tmp/*
 
 COPY . .
 
+FROM scratch
+
+WORKDIR /app
+
+ENV LANG=zh_CN.UTF-8 \
+    TZ=Asia/Shanghai \
+    BILI_IN_DOCKER=true
+
+COPY --from=base / /
+
 ENTRYPOINT [ "tini", "python", "entry.py" ]
 
 VOLUME [ "/app/config", "/app/data", "/app/thumb", "/Videos/Bilibilis" ]