Fixes https://github.com/turt2live/matrix-media-repo/issues/468

Check user.IsShared when testing for repo admin access.

Merge pull request #486 from turt2live/dependabot/go_modules/github.com/docker/docker-24.0.7incompatible

Bump github.com/docker/docker from 24.0.6+incompatible to 24.0.7+incompatible

Bumps [github.com/docker/docker](https://github.com/docker/docker) from 24.0.6+incompatible to 24.0.7+incompatible.
- [Release notes](https://github.com/docker/docker/releases)
- [Commits](https://github.com/docker/docker/compare/v24.0.6...v24.0.7

)

---
updated-dependencies:
- dependency-name: github.com/docker/docker
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Upgrade dependencies

Improve error handling around redis cache population on upload

Bump golang.org/x/net from 0.15.0 to 0.17.0

For https://github.com/turt2live/matrix-media-repo/issues/482

Bumps [golang.org/x/net](https://github.com/golang/net) from 0.15.0 to 0.17.0.
- [Commits](https://github.com/golang/net/compare/v0.15.0...v0.17.0

)

---
updated-dependencies:
- dependency-name: golang.org/x/net
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Fixes https://github.com/turt2live/matrix-media-repo/issues/459

For https://github.com/turt2live/matrix-media-repo/issues/459

For https://github.com/turt2live/matrix-media-repo/issues/459

For safety

Slightly smaller ldflags, or something

Fixes https://github.com/turt2live/matrix-media-repo/issues/460

Fixes https://github.com/turt2live/matrix-media-repo/issues/460

Fixes https://github.com/turt2live/matrix-media-repo/issues/461

Fixes https://github.com/turt2live/matrix-media-repo/issues/462