Docker reduces image retaining to 6 months for free plans starting Nov 1, 2020

https://www.docker.com/pricing/retentionfaq#:~:text=Docker%20is%20introducing%20a%20container,will%20have%20unlimited%20image%20retention

Docker is introducing a container image retention policy which will be enforced starting November 1, 2020. The container image retention policy will apply to the following plans:
* Free plans will have a 6 month image retention limit
* Pro and Team plans will have unlimited image retention