I Solved it , for any having this trouble :
all i did is editing the file in " \appdata\NginxProxyManager\nginx\proxy_host " for proxy you went and add the following text after this line
" location / { "
add_header Content-Security-Policy "upgrade-insecure-requests";
add_header X-Frame-Options "SAMEORIGIN" always;
add_header X-XSS-Protection "1; mode=block" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-UA-Compatible "IE=Edge" always;
add_header Cache-Control "no-transform" always;
add_header Referrer-Policy "same-origin" always;
add_header Feature-Policy "autoplay 'none'; camera 'none'" always;
and restart the docker for the Nginx Proxy Manager .
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Docker : CalibreWeb from linuxserver
if any could help me please , is there any danger if left alone because every thing is working we me
i tired the https://securityheaders.com
to see if every thing is right in security Department but got red ones there any way to fix them ?
>i tried adding "add_header X-Frame-Options "SAMEORIGIN";" but didn't do any.