docker-compose build process fails to bring up "meteor"

[arranstewart]

Using the current HEAD in master (55bb7ec), it appears that the "meteor" service can't be built and brought up on AMD64 platforms: it fails while trying to build a gosu binary, with the error:

runtime: failed to create new OS thread (have 2 already; errno=22)
fatal error: newosproc

The reason seems to be that the "meteor" service is built from the jshimko/meteor-launchpad:latest image, and jshimko/meteor-launchpad:latest is currently only built for the ARM64 architecture. As a result, the build of the service eventually fails due to this issue: gosu can't be built within Docker for a different architecture from the host platform.

I've attached a full transcript (using script) of an attempted build as [typescript.txt].(https://github.com/haslab/Alloy4Fun/files/8692933/typescript.txt)