fix: update Dockerfile.

Dockerfile

-FROM node:14.15.0
+FROM node:14.15.0 as builder
 
 
 WORKDIR /opt/ferry_web
 WORKDIR /opt/ferry_web
 COPY . .
 COPY . .
 
 
-RUN npm config set registry "https://registry.npm.taobao.org/" && npm install
+RUN npm install -g cnpm --registry=https://registry.npm.taobao.org && cnpm install
 RUN npm run build:prod
 RUN npm run build:prod
 
 
 FROM nginx:1.18.0
 FROM nginx:1.18.0
 
 
+COPY --from=builder /opt/ferry_web/web /opt/web
+
 #暴露容器8001端口
 #暴露容器8001端口
 EXPOSE 8001
 EXPOSE 8001
\ No newline at end of file