Once again, trying to make Collabora Online work.

conf.d/code.shore.co.il.conf

@@ -19,6 +19,7 @@ server {
     include     snippets/ads-txt.conf;
     include     snippets/security-txt.conf;
     include     snippets/ssl.conf;
+    add_header  Content-Security-Policy "frame-ancestors https://*.shore.co.il";
 
     # The following was copied (and modified) from
     # https://www.collaboraoffice.com/code/nginx-reverse-proxy/.