Dockerfile Updates

[eugene-davis]

Updates the version of PHP and AgenDAV used, swaps to sqlite, sets the user command and starts running on port 8080 to reduce required privileges.

I've tried to keep commits isolated, so potentially it could be split up into different PRs, but grouped them together for now as this gets the image into a more secure state.

Commits

• feat: update to php 7.4 and upgrade version - swaps to the Docker PHP image for 7.4. This was the latest version of PHP that would work with the mysql migrations. Note that 7.4 is still EOL.
• chore: clean up image build - trying to slim the image size a bit
• feat: change to sqlite - avoids running a second service in the background, for a stateless environment most likely powerful enough to avoid performance issues, allows upgrading PHP further
• update: php version to 8.2 - update to 8.2, which works with the sqlite driver. Possibly a different mysql driver would also work with this
• feat : set user to www-data and start using port 8080 - removes root and reduces privileges required to run the container

[nagimov]

@eugene-davis Thank you for your work on this!! I'll merge in a few days. Have you tested the ARM build from #13 as well?

[eugene-davis]

@nagimov I had not tested it, the build is able to complete based on the updates in this branch.

See the build or the resulting packages

I moved the commit into #13 - if it makes more sense I can rebase that branch into this PR.

Please note I haven't tested the arm image (just amd64 and arm64).