Nginx redirect to https

server {

    listen 80 default_server;

    server_name _;

    return 301 https://$host$request_uri;

}

server {

    listen 443 ssl default_server;

    server_name _;

    root /usr/share/nginx/html;

    ssl_certificate /etc/nginx/ssl/public.pem;

    ssl_certificate_key /etc/nginx/ssl/private.key;

    rewrite ^(/.*)\.html(\?.*)?$ $1$2 redirect;

    rewrite ^/(.*)/$ /$1 redirect;

    location / {

        try_files $uri/index.html $uri.html $uri/ $uri =404;

    }

    location = /admin {

        auth_basic "Login Required";

        auth_basic_user_file /etc/nginx/.htpasswd;

        try_files $uri/index.html $uri.html $uri/ $uri =404;

    }

    error_page 404 /404.html;

    error_page 500 501 502 503 504 /50x.html;

}