k8s nginx-ingress upload file size limit

k8s cluster, will upload pictures or files to a file server,
but the error will be larger than 1M are
413 Request Entity Too Large

I used to use:
   # ingress.kubernetes.io/proxy-body-size: "50m"   

Now using:
nginx.ingress.kubernetes.io/proxy-body-size: "50m"
The latest version of ingress and deployment is needed configmap of RBAC.

First, add the web in nginx.conf

client_body_buffer_size 50m;
client_max_body_size 100m;

Second, the modifications in various service
 annotations:

   nginx.ingress.kubernetes.io/proxy-body-size:"50m" 

Restart the service