examples improvement - added some README.md stubs

examples/multisite-custom-confs/server-confs/nc.example.com/nextcloud.conf

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+location ~ \.php(?:$|/) {
+        fastcgi_split_path_info ^(.+?\.php)(/.*)$;
+        set $path_info $fastcgi_path_info;
+
+        try_files $fastcgi_script_name =404;
+
+        include /etc/nginx/nc.example.com/fastcgi.conf;
+        fastcgi_param SCRIPT_FILENAME /var/www/html/$fastcgi_script_name;
+        fastcgi_param PATH_INFO $path_info;
+        fastcgi_param HTTPS on;
+
+        fastcgi_param modHeadersAvailable true;         # Avoid sending the security headers twice
+        fastcgi_param front_controller_active true;     # Enable pretty urls
+        fastcgi_pass mync:9000;
+
+        fastcgi_intercept_errors on;
+        fastcgi_request_buffering off;
+}
+
+location ~ \.(?:css|js|svg|gif)$ {
+        try_files $uri /index.php$request_uri;
+        expires 6M;         # Cache-Control policy borrowed from `.htaccess`
+}
+
+location ~ \.woff2?$ {
+        try_files $uri /index.php$request_uri;
+        expires 7d;         # Cache-Control policy borrowed from `.htaccess`
+}
+
+location / {
+        try_files $uri /index.php$request_uri;
+}

examples/multisite-custom-confs/server-confs/wp.example.com/permalinks.conf

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+location / {
+    index index.php index.html index.htm;
+    try_files $uri $uri/ /index.php?$args;
+}