Hostker/Zhujike DDNS script for asuswrt-merlin.
You'll need a Hostker API key and configure the script in the header.
The script depends on JSON.sh, and will download a copy into the current directory if it doesn't exist. If your deploy won't have write access, download it and give it executable permissions in the same directory.
Put ddns-start in /jffs/scripts
Remember
chrom +x /jffs/scripts/ddns-start
Then in router setting enable DDNS, choose Custom.