build: disable CGO

[nabeken]

Hello,

I'm testing the release binary with Lambda Function and got the following error:

/var/task/ecs-drain-lambda: /lib64/libc.so.6: version `GLIBC_2.32' not found (required by /var/task/ecs-drain-lambda)
/var/task/ecs-drain-lambda: /lib64/libc.so.6: version `GLIBC_2.34' not found (required by /var/task/ecs-drain-lambda)
2023/03/11 05:37:25 exit status 1

It seems like the build environment is too new compared to the lambda runtime environment (Amazon Linux 1). I think the binary doesn't require CGO so disabling it would be a simple solution.

[nabeken]

@trane9991 gentle reminder when you have time 😄

[taraspos]

Hey, @nabeken did you have a chance to run and test it without CGO enabled?

[taraspos]

yeah, I think disabling CGO should be a good idea, however, it would be nice to try to run it in the actual environment, before pushing it to the mainline.

[nabeken]

@trane9991 yes, I did the test with the binary built with my fork at https://github.com/nabeken/ecs-drain-lambda/releases/tag/v1.0.6-nabeken and it worked well.

[taraspos]

Released in v1.0.7. Thanks!