Docker image release management

[smalot]

In order to use the last patch of a minor release using Docker, it should be interesting to update an image tag without the patch number after the last release patch is published.

For example :

before patch :

• current tag : 1.4 and 1.4.15

after patch :

• old tag : 1.4.15
• new tag : 1.4 and 1.4.16

I'm not to be very clear, but I'm suggesting something which is already applied for example on Nginx docker image :

Like this, we could keep up to date when using tags like "latest" or "1" or "1.4"