Changes to docker files and field descriptions

[rskthomas]

Description

I´ve done some grammatical changes, mostly form descriptions, as they sounded a bit broke-ish.

The remote docker images are unavailable (and have been for a while) so i´ve modified the docker-compose file to build the images locally.

I´ve added a docker service to backup the postgres db every day, but this was a need of mine so feel free to ignore it.

Also, a package was missing on the docker build (xslxwriter) that was used on the export as csv function.

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

• [x] Normal use of the webapp

Exhaustive testing was not done, as its mostly superficial changes. The docker images keep functioning as usual.

Checklist:

• [x] I have performed a self-review of my own code

[lazki]

I can confirm this PR works in Ubuntu 24.04 with Docker version 27.0.2, build 912c1dd

[pedro-nonfree]

@cayop and I approve this PR, thanks for your work @rskthomas !