fix Dockerfile: package manager from yarn->pnpm (#761)

Co-authored-by: walkerdu <walkerdu@tencent.com>

Dockerfile

@@ -20,7 +20,7 @@ COPY ./pnpm-lock.yaml /root/running_page/pnpm-lock.yaml
 RUN npm config rm proxy&&npm config set registry https://registry.npmjs.org/ \
   &&npm install -g corepack \
   &&corepack enable \
-  &&yarn install
+  &&pnpm install
 
 FROM develop-py AS data
 ARG app
@@ -61,7 +61,7 @@ RUN python3 run_page/gen_svg.py --from-db --title "my running page" --type grid
 FROM develop-node AS frontend-build
 WORKDIR /root/running_page
 COPY --from=data /root/running_page /root/running_page
-RUN yarn run build
+RUN pnpm run build
 
 FROM nginx:alpine AS web
 COPY --from=frontend-build /root/running_page/dist /usr/share/nginx/html/