[BUG] Devcontainer `bun run dev:full`/`sim-start` failing

[cabaucom376]

While following the development guide when getting to the command stage running either bun run dev:full or sim-start results in the error:

$ cd apps/sim && bun run dev:full
$ concurrently -n "App,Realtime" -c "cyan,magenta" "bun run dev" "bun run dev:sockets"
/bin/bash: line 1: concurrently: command not found
error: script "dev:full" exited with code 127
error: script "dev:full" exited with code 127