There was no favicon at all -- index.html never linked one, and the
frontend Dockerfile's build stage never copied the public/ directory
into the build context, so even after adding public/favicon.svg
locally, the containerized build silently dropped it (nginx fell back
to serving index.html for that path). Fixed both: index.html links
/favicon.svg, and the Dockerfile now copies public/ alongside src/.
The favicon reuses the existing BrandMark glyph (petrol background,
teal accent) for visual consistency with the in-app brand mark.
A regression test for this lives in the earlier translation-fix commit
(frontend/e2e/fleet-ops-correction.spec.ts), added together with the
fix at the time.
NuklearRabbit
f0d641198c