Add Headers in Docker Kong

[venkin304]

I am trying to add HSTS header in the Kong docker-compose.yml file as env variable:
KONG_NGINX_PROXY_ADD_HEADER: 'Strict-Transport-Security: max-age=31536000'.

But I am getting CORS issue after adding this header. guess this setting is overriding 'Access-Control-Allow-Origin *'.

How can I add multiple headers in my docker-compose.yml file ?

Or is there a better way to add these headers in my dockerised Kong ?