Add multiarch support and GitHub actions. Support even older versions with newest features

rootfs/etc/cont-init.d/10-init-wordpress

@@ -12,7 +12,7 @@ WP_VERSION=$(echo "${WP_VERSION}" | sed --expression='s/.0//g');
 function disableUpdatesPatch() {
   if [ "${DISABLE_WP_UPDATES}" != "false" ]; then
     echo "> Disabling WordPress updates..."
-    patch /var/www/html/wp-admin/update-core.php </etc/wp-mods/wp-admin/update-core.php.patch
+    patch /var/www/html/wp-admin/update-core.php </etc/wp-mods/wp-admin/wp-admin-update-core.patch
   fi
 }
 

rootfs/etc/wp-mods/wp-admin/update-core.php.patch

@@ -1,14 +0,0 @@
---- update-core.php	2021-09-01 20:18:43.638426162 +0200
-+++ update-core.php	2021-09-01 20:21:05.189582541 +0200
-@@ -1086,6 +1086,11 @@
- 		wp_die( __( 'Sorry, you are not allowed to update this site.' ) );
- 	}
- 
-+	wp_die(
-+		__( 'Sorry, you are not allowed to update this site.' ) .
-+		' Click <a href="https://github.com/N0rthernL1ghts/wordpress/wiki/WordPress-Core-Updates">here</a> to learn why.'
-+	);
-+
- 	check_admin_referer( 'upgrade-core' );
- 
- 	// Do the (un)dismiss actions before headers, so that they can redirect.