Cannot rebuild app

[david (David Taylor)]

High rebuild memory requirements: April 2025 edition

We just landed this commit which should hopefully improve the situation. Please let us know how you get on! (it’ll hit tests-passed in the next ~30 mins) When testing with a memory-constrained docker container locally, I can now get a successful build with -m 1600m. Before this change, the minimum I could achieve was -m 3000m.