Increase upload file size in forms

Form upload size is the Max body size on the MgnlIngress: nginxOptions.proxyBodySize. The default is 8096k.

Leave ingress.enabled off in values.yml. Set a larger value on the MgnlIngress when a form must accept a bigger upload. Field names are in Map UI fields to manifest.

nginxOptions:
  proxyBodySize: "512m"