offline read docker image add tips

Signed-off-by: Kang Huaishuai <khs1994@khs1994.com>

.github/workflows/ci.yaml

@@ -74,6 +74,8 @@ jobs:
 
           echo "FROM nginx:alpine" >> Dockerfile
           echo "COPY .vuepress/dist /usr/share/nginx/html" >> Dockerfile
+          echo "COPY .docker/docker-entrypoint.sh /" >> Dockerfile
+          echo "CMD [\"sh\", \"/docker-entrypoint.sh\"]" >> Dockerfile
 
           echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
 
@@ -82,6 +84,7 @@ jobs:
           docker build -t dockerpracticesig/docker_practice:vuepress \
           --label org.opencontainers.image.revision=$VCS_REF \
           --label org.opencontainers.image.source="https://github.com/yeasy/docker_practice" \
+          --label maintainer="https://github.com/docker-practice" \
           .
 
           docker push dockerpracticesig/docker_practice:vuepress