Increase the default file max

[andrewxhill]

I/System.out: RESOURCE_EXHAUSTED: grpc: received message larger than max (6464397 vs. 4194304)

when sending a 5mb file across the api

[andrewxhill]

Nevermind. The better thing to do is chunk the file up for sending over the wire. I've done this now in the client and it works great.

[asutula]

FWIW, I read a blog post where the guy studied the optimal chunk size for grpc file transfer... 1024 bytes. Do it.

[andrewxhill]

oh cool, i just stole the midpoint from this guys "spoiler alert" grpc/grpc.github.io#371 32kb

[asutula]

This guys graphs sold me https://ops.tips/blog/sending-files-via-grpc/