What happens when you deploy your app, and then you want to fix a bug, or simply release an update?

Once you have a container running, you can get its ID using docker ps, then you use docker commit to create a new tag for the image from it:

docker commit <id> <username>/<imagename>:<tagname>

You can also add a changelog message that lists what changed in the new version:

docker commit --change "description" <id> <username>/<imagename>:<tagname>

Lessons in this unit:

0:	Introduction
1:	Working with Images from the command line
2:	Working with Containers from the command line
3:	Troubleshooting container exits
4:	▶︎ How to commit changes to an image
5:	Updating a deployed container
6:	Accessing files outside a container
7:	Dockerfile for Astro on Fly.io
8:	Dockerfiles for Astro and Pocketbase on Railway