Merge branch 'feature/cross-origin' into 'develop'

Access-Control-Allow-Origin

See merge request pleroma/pleroma!52

installation/pleroma.nginx

@@ -22,6 +22,7 @@ server {
     server_name example.tld;
 
     location / {
+        add_header 'Access-Control-Allow-Origin' '*';
         proxy_http_version 1.1;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection "upgrade";