Updating the Dockerimages on Docker Hub

[SoGam34]

I am planning to set up an instance of FixMyStreet using Docker. I noticed that the Docker image on Dockerhub is outdated. It is for version 3.1 of FixMyStreet, but the newest version is 5.0. Additionally, the nginx, memcache, and PostgreSQL images that are being used are also several versions behind the newest version on Docker Hub.

I would do it myself, but I am not familiar with Docker and the FixMyStreet Codebase. Therefore, it is difficult for me to make changes. If other people are already using Docker or planning to do so, they will also need to make important changes and cannot simply pull them from https://hub.docker.com/u/fixmystreet/.

Could you please update all the Dockerfiles and images that are available on Docker Hub?