app/config/initializers/content_security_policy.rb
# Be sure to restart your server when you modify this file.
# Define an application-wide content security policy
# For further information see the following documentation
# https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy
# Rails.application.config.content_security_policy do |policy|
# policy.default_src :self, :https
# policy.font_src :self, :https, :data
# policy.img_src :self, :https, :data
# policy.object_src :none
# policy.script_src :self, :https
# policy.style_src :self, :https
# # Specify URI for violation reports
# # policy.report_uri "/csp-violation-report-endpoint"
# end
# If you are using UJS then enable automatic nonce generation
# Rails.application.config.content_security_policy_nonce_generator = -> request { SecureRandom.base64(16) }
# Report CSP violations to a specified URI
# For further information see the following documentation:
# https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only
# Rails.application.config.content_security_policy_report_only = true