Two separate leaks were causing the same cosmetic-but-annoying warning to
survive every previous fix attempt:
1. Compose's own `secrets:` block reads the referenced file's *content*
as part of its config model, and applies the same interpolation
warning to it — even with DB_PASSWORD fully removed from every ${VAR}
and --env-file path. Switched from Compose's native `secrets:` to plain
bind mounts at the same /run/secrets/* paths: a bind mount only ever
touches the file's path, never its content, so it's immune. (Verified
this precisely with an isolated repro before rolling it out — the two
mechanisms behave differently even though they look equivalent.)
2. caddy's `env_file: .env.staging` (a leftover from the since-removed
basic-auth setup) loaded the *raw*, unfiltered env file directly,
bypassing deploy.sh/backup.sh/restore.sh's filtered-copy mechanism
entirely. Caddy only ever needed SITE_DOMAIN; switched to passing that
one value directly instead of the whole file.
Also fixed Caddyfile.staging: the site address had no explicit scheme, so
Caddy's automatic-HTTPS logic still applied to a private IP (registering
its own internal CA and redirecting HTTP->HTTPS) — not the "plain HTTP
only" behavior I'd assumed and told the user earlier. Prefixed with
`http://` to genuinely disable automatic HTTPS for this LAN-only box.
Verified end-to-end: fresh deploy with dollar-sign DB passwords produces
zero warnings, serves HTTP 200 on plain http:// with no redirect, and the
DB connection genuinely authenticates.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
twooeyandClaude Sonnet 5
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