Close #283 update Dockerfile and README

[donyunardi]

Thank you for your Pull Request! We have developed this task checklist to help with the final steps of the process. Completing the below tasks helps to ensure our reviewers can maximize their time on your blog post.

Please check off each taskbox as an acknowledgment that you completed the task or check off that it is not relevant to your Pull Request. This checklist is part of the Github Action workflows and the Pull Request will not be merged into the main branch until you have checked off each task.

• Place Closes #<insert_issue_number> into the beginning of your Pull Request Title (Use Edit button in top-right if you need to update), and make sure the corresponding issue is linked in the Development section on the right hand side
• Address all merge conflicts and resolve appropriately
• Assign two of us (@bms63, @manciniedoardo, @StefanThoma, @kaz462) as reviewers in the PR.
• Pat yourself on the back for a job well done! Much love to your accomplishment!

[donyunardi]

I pushed the image to the registry:

and able to render all posts

[bms63]

Thanks @donyunardi for updating docker image.

once we merge in your other PR and update this branch all CI actions will pass.