Security middlewares csp option added (#6694)
Security middlewares csp option added (#6694)

Added missing explanation on how to set the "Content-Security-Policy"(csp) header value

Co-authored-by: Alexandre BODIN <578708072e5676d59d2ac7404f73316177622ca0@users.noreply.github.com>
wistityhq/strapi,wistityhq/strapi