最新查看镜像的方式
grep base_image /var/discourse/templates/*.yml
显示如下：
/var/discourse/templates/postgres.template.yml:base_image: discourse/base:2.0.20261027-1647
/var/discourse/templates/redis.template.yml:base_image: discourse/base:2.0.20261027-1647
/var/discourse/templates/web.template.yml:base_image: discourse/base:2.0.20261027-1647
/var/discourse/templates/web.webonly.template.yml:base_image: discourse/base:2.0.20261027-1647-web-only
然后手动更新进行
docker pull discourse/base:2.0.20261027-1647