Let's do a few basic things that will help you get started.
Create snapshot
Find your container ID:
docker ps -a
Create new image from your container:
docker commit acd51d77124b name_of_your_new_image
Note: Replace 'acd51d77124b' with the actual ID for your container.
List all your images to see your recent snapshot:
docker images
Restore from your snapshot
Start a new container from your image:
docker run -dit --name your_new_container_name -p 127.0.0.11:443:443 -p 127.0.0.11:80:80 name_of_your_new_image
Note: Replace '127.0.0.11' with whatever IP you want to use.
Stop your running container:
docker stop your_new_container_name
Start your container again:
docker start your_new_container_name
(Optional) Remove changes
Delete the container you just created (make sure it is stopped first - see above):
docker rm your_new_container_name
Delete the image you just created:
docker rmi name_of_your_new_image