This is a json gateway to ISPConfigs Soap API. It is not and I think it will never be a one 2 one implementation. We just add all the functions like we need. :-) Sorry for that.
You can scale up the container so often you like. Every Reseller should be a company and have his own container.
docker run \
-e username=$username \
-e password=$password \
-e location=$location \
-e billing=$billing \
-e uri=$uri \
-e id=$id \
-e vat=$vat \
-e default_invoice_template=$default_invoice_template \
-e default_invoice_email_template=$default_invoice_email_template \
-e payment_terms=$payment_terms \
-e allow_self_signed=$allow_self_signed \
-e reseller_id=$reseller_id \
-p 8777:8888 \
avhost/ispconfig-jsonrpc