How to Disable sameorigin from a bitnami + WordPress + NGINX stack

I need to disable SAMEORIGIN x-frame feature, how can I achieve this?

I read that if I add Header always unset X-Frame-Options to my .htaccess it would prevent the header, but i dont have .htaccess file. I tried modifing the nginx conf file but it still didn’t work, I want to use iframe from other websites to display content from my site. any ideas?