Without this, 'mix release' produced a tarball that had app.css/app.js
(so LiveView worked) but was missing cache_manifest.json and the digested
asset paths. Phoenix served the bare files OK, but the client-side
LiveView bootstrap timing was fragile: if a form was submitted before
the LiveSocket attached, the browser fell back to a native HTML GET,
producing bug-report URLs like /admin/hosts?host%5Bname%5D=repl.
Define a project releases/0 with a pre-assemble step that runs
assets.deploy, so minified + digested assets are baked into every
release tarball.
Also gitignore digested priv/static artifacts so dev-time byproducts
don't pollute commits.
Returns 200 with {status: ok, version, db: ok} when SQLite is reachable,
503 when the DB probe fails. Unauthenticated so external monitors can
poll without credentials.
Extended Server.Release with migrate/0 and rollback/2 so
'bin/server eval Server.Release.migrate' works from a released binary.
Removed the phx.gen.release-generated rel/overlays/bin/server wrapper
that hardcoded 'start' — it collided with the mix-release default
dispatcher, blocking 'server version', 'server eval', etc. The 'migrate'
overlay is kept (bin/migrate calls server eval under the hood).
Blocking bootstrap in dev meant you couldn't even run 'mix run' to
generate the initial hash. Now dev/test accept an optional env override
and boot without it; prod still raises when unset.
Application.start ran mark_all_offline unconditionally, which meant
every "mix run"/"mix ecto.migrate" invocation would flip all
connected hosts to offline. Gate the call on Phoenix.Endpoint.server?
so non-serving boots don't disturb live state.
