Change the build to use static libraries

[mrmason]

Changes the build process to use static libraries. This does make the docker image bigger, but stops any library mismatches coming from using different alpine:latest images in chained docker images.

Fixes #178
Fixes #174

[dentarg]

It use to be static but then it was changed with 2e54b76

The Docker images we publish are built with --static (https://github.com/search?q=repo%3Acloudamqp%2Famqproxy%20static&type=code) but you aren't using them?

[dentarg]

Looks like the simplest solution? :) I will let others merge this if they are OK with it

[mrmason]

It use to be static but then it was changed with 2e54b76

The Docker images we publish are built with --static (https://github.com/search?q=repo%3Acloudamqp%2Famqproxy%20static&type=code) but you aren't using them?

Unless I'm mistaken, that search shows that the tarball is built static, not the docker image? I was assuming that the Dockerfile in the root was what would be used to produce the docker images on dockerhub. Those are the images we are using, and the ones we've seen the bugs reported in this PR.

I can see the previous commit that removes the static, and I've shown in #178 that this does indeed increase the image size - however this is from 11MB to 32MB - so I don't see it as a problem for most workloads.

I would suggest that if the aim is to get a super small image, then all of the docker images need to be version pinned throughout the build process.

[j-m-harris]

The Docker images we publish are built with --static (https://github.com/search?q=repo%3Acloudamqp%2Famqproxy%20static&type=code) but you aren't using them?

Perhaps I'm missing something, but they don't appear to be:

$ docker pull cloudamqp/amqproxy:v2.0.2
$ docker run -it --entrypoint /bin/sh  cloudamqp/amqproxy:v2.0.2
/ $ ldd /usr/bin/amqproxy 
        /lib/ld-musl-x86_64.so.1 (0x7e93e6db1000)
        libssl.so.3 => /lib/libssl.so.3 (0x7e93e6a77000)
        libcrypto.so.3 => /lib/libcrypto.so.3 (0x7e93e662f000)
        libpcre2-8.so.0 => /usr/lib/libpcre2-8.so.0 (0x7e93e6584000)
        libevent-2.1.so.7 => /usr/lib/libevent-2.1.so.7 (0x7e93e653a000)
        libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0x7e93e6516000)
        libc.musl-x86_64.so.1 => /lib/ld-musl-x86_64.so.1 (0x7e93e6db1000)

[dentarg]

Sorry I got that wrong. Thanks for checking.

[j-m-harris]

Sorry I got that wrong. Thanks for checking.

Np, appreciate you taking a look at all!