fix: update Content-Security-Policy to allow HTTP connections as default (#1053)

Author: runejo

nginx/conf.d/headers.txt

@@ -5,4 +5,4 @@ add_header Strict-Transport-Security "max-age=31536000; includeSubDomains";
 add_header Permissions-Policy "accelerometer=(), autoplay=(), camera=(), encrypted-media=(), fullscreen=(self), geolocation=(), gyroscope=(), magnetometer=(), microphone=(), midi=(), payment=(), picture-in-picture=(), usb=()";
 add_header X-XSS-Protection "1; mode=block";
 # You should harden the 'connect-src' to your PxWebApi address
-add_header Content-Security-Policy "default-src 'none'; script-src 'self'; connect-src 'self' https:; style-src 'self'; img-src 'self'; font-src 'self'; object-src 'none'; frame-ancestors 'self'; base-uri 'self';";
+add_header Content-Security-Policy "default-src 'none'; script-src 'self'; connect-src 'self' http:; style-src 'self'; img-src 'self'; font-src 'self'; object-src 'none'; frame-ancestors 'self'; base-uri 'self';";