Documentation
Configuration / filesystem.directories
This config option enables you to override global config options on directories matching a specific pattern. This pattern can either be a public file system path like "/files/documents" or a directory name like "images".
If a public file system path is specified that specific path and all directories below it would get the new option. If you specify only a directory name any directory anywhere matching that exact name would have the speicifed config options.
$moxieManagerConfig['filesystem.directories'] = array(
"images" => array(
"upload.extensions" => "gif,jpg,png"
),
"/files/documents" => array(
"upload.extensions" => "docx,pdf"
)
);
<add key="filesystem.directories">
<directory pattern="images">
<add key="upload.extensions" value="gif,jpg,png" />
</directory>
<directory pattern="/files/documents">
<add key="upload.extensions" value="docx,pdf" />
</directory>
</add>