Add nginx delay

[beelchester]

#289

[neo773]

CI already takes like half an hour to run, compiling nginx from source would double that time.
Aren't there prebuilt nginx binaries with echo module?

[beelchester]

Thanks, I've now used openresty instead, which is recommended for echo module.

[tusharmath]

I don't think this is working moving to draft until everything is fixed.

[neo773]

@beelchester
Won't lua have an overhead?

[beelchester]

I don’t think it will cause any significant overhead.
Also, for benchmarking, relative performance matters.