The repository had no container image and no production-shaped serving
configuration. `dist/server.mjs` is a preview server that applies neither
the security headers nor the cache policy `config/hosting/` declares, so a
deployment had nothing correct to run.
`scripts/generate-nginx-config.ts` derives the server block from
`dist/tech-log-serving-contract.json` plus the two hosting policy files, so
the served headers and cache lifetimes cannot drift from what the contract
declares. It emits no TLS and no proxy blocks: the edge terminates TLS and
routes /api, and baking a backend address into the image would tie the
bundle to one deployment. Static surfaces use `alias` because a base-path
build serves /dev/assets/... out of dist/assets/..., which `root` plus URI
would look for one directory too deep.
The image copies that config next to the bundle and normalises permissions:
the build writes config.json 0600, which nginx cannot read, so the container
came up healthy and answered 403 for the one file the SPA needs to boot.
index.html never referenced public/favicon.svg. The file shipped and nginx
served it, but browsers asked for /favicon.ico, got a 404, and fell back to
the default icon. `%BASE_URL%` rather than an absolute path so a prefixed
deployment points at its own copy.
development.json moves to the HTTP Studio source; the mock source has no
backend to authenticate against, which is the whole point of that profile.
