Fix sharp in container, add admin downloads and anchor mark

- ship libvips with the runtime image so POST /api/v1/media stops failing
- admin downloads openapi.json and the style guide via session, no token
- copy rows for both API addresses
- anchor mark in the wordmark and a favicon

src/lib/admin-routes.ts

@@ -12,6 +12,10 @@ export const adminClientsPath = '/admin/clients' as Route
 export const adminPostTypesPath = '/admin/post-types' as Route
 export const adminNewPostTypePath = '/admin/post-types/new' as Route
 
+export function adminApiFilePath(file: 'openapi' | 'style-guide'): Route {
+	return `/admin/api/files/${file}` as Route
+}
+
 export function adminPostTypePath(id: string): Route {
 	return `/admin/post-types/${encodeURIComponent(id)}` as Route
 }