Synology NAS wordpress with docker modify upload_max_filesize

1. Prepare uploads.ini file depends on your usage, upload it to somewhere on your NAS. For example: /wordpress-docker/data/uploads.ini

file_uploads = On
memory_limit = 500M
upload_max_filesize = 500M
post_max_size = 500M
max_execution_time = 600

2. Goto Container manager > Container > xxx-wordpress
3. Stop the container then editing settings
4. Add a docker volume link from /wordpress-docker/data/uploads.ini to /usr/local/etc/php/conf.d/uploads.ini
5. Start your container, and it works
6. Be aware that this configuration will be auto removed when dockert image upgrade, so you need to re-configured again then.