feat: update docker file

Dockerfile

@@ -0,0 +1,19 @@
+FROM docker.hub.ipao.vip/jrottenberg/ffmpeg:4.4-alpine
+
+# Set timezone
+RUN apk add --no-cache tzdata && \
+    cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && \
+    echo "Asia/Shanghai" > /etc/timezone && \
+    apk del tzdata && \
+    mkdir -p /app/downloads /app/dist
+
+COPY backend/build/app /app/app
+COPY backend/config.prod.toml /app/config.toml
+COPY frontend/admin/dist /app/dist/admin
+COPY frontend/wechat/dist /app/dist/wechat
+
+WORKDIR /app
+
+ENTRYPOINT  ["/app/app"]
+
+CMD [ "serve" ]