main.content (.content-builder) inherited "margin:0 auto" from the
base .content class. On this page body is a column flex container, so
that auto margin disabled cross-axis stretch and made the element
shrink-to-fit instead — sized via an algorithm that runs back down
through the flex/%/aspect-ratio chain to the canvas, and shifts
slightly whenever sibling panel content changes (e.g. selecting an
element). Give it an explicit width:100% so max-width/auto-margin
centering still work but sizing is stable and fills the available
space. Also add min-width:0 to .builderPanelRight, matching its
siblings, as defense against the same class of bug.
Verified with Playwright: canvas box was previously not filling
available width (918px expected vs 379px actual at a 1920px viewport)
and shifted between steps; both are fixed.
su forge -s /bin/sh -c 'exec "$@"' -- "$@" didn't forward gunicorn's
argv correctly with this image's su, so the container never actually
started gunicorn — Caddy then had nothing to proxy to (502). Flatten
the command into a single string via "$*" instead.
The named Docker volume mounted at /app/projects is created by Docker
as root before the container starts, so the image's build-time chown
never applies to it. A root-owned volume made the app (running as the
non-root forge user) unable to write new game folders in production.
Add an entrypoint that chowns /app/projects to forge at each startup,
then drops privileges before exec'ing gunicorn.