patch changes & fixes from master branch

remove VERSION file
update rules
add 33 migration
add get_version_for_release.sh script
update schema
add use_character_sample_skills

nginx-sample.conf

@@ -11,7 +11,7 @@ server {
         location ~ \.php$ {
                 include snippets/fastcgi-php.conf;
                 fastcgi_read_timeout 240;
-                fastcgi_pass unix:/var/run/php/php7.2-fpm.sock;
+                fastcgi_pass unix:/var/run/php/php7.4-fpm.sock;
         }
 
         location ~ /\.ht {
@@ -22,4 +22,4 @@ server {
            deny all;
            return 404;
         }
-}
+}