Release 3505
Trello card
n/a
Context
Remove libpng 1.6.55-r0 pin from Dockerfile, which was added for a snyk vulnerability
The build now requires a later version
Might need to break the cache for master once this is merged
Changes proposed in this pull request
Dockerfile update
Guidance to review
see https://github.com/DFE-Digital/schools-experience/actions/runs/24667685243 (build without cache)
https://github.com/DFE-Digital/schools-experience/actions/runs/24667134801