- Change Helmet default from no-referrer to strict-origin-when-cross-origin
so browsers send the origin on cross-origin requests, allowing Google Maps
API key restrictions by HTTP referrer to work correctly
- Document HSTS_INCLUDE_SUBDOMAINS in all deployment artifacts:
.env.example, docker-compose.yml, README.md, unraid-template.xml,
charts/values.yaml, charts/configmap.yaml, wiki/Environment-Variables.md