Deploy production

running at https://val--forge-apps.benjivers.com

Carries #2, #4, #7, #9, #11, #13, #15, #17, #19, #21, #23, #27, #28, #31, #32, #33, #34, #35, #37, #39, #41, #43.

Contained: the repository's code ran in a cell of its own, with limits.