Documentaiton Unclear to build OpenTelemetry nginx module

[dchittibala]

Trying to follow https://github.com/open-telemetry/opentelemetry-cpp-contrib/blob/main/instrumentation/nginx/README.md

1. Where do we build or download the otel_ngx_module.so module?
2. the statement from Usage Download the .so file from the latest [GitHub Action run](https://github.com/open-telemetry/opentelemetry-cpp-contrib/actions/workflows/nginx.yml) or follow the instructions above to build. Then modify nginx.conf, or see the [example](https://github.com/open-telemetry/opentelemetry-cpp-contrib/blob/main/instrumentation/nginx/test/conf/nginx.conf) is not clear

[esigo]

please find an example for build here https://github.com/kubernetes/ingress-nginx/blob/main/images/opentelemetry/rootfs/Dockerfile or an image containing the build here

[gaffneyd4]

I copied latest artifacts from here: https://github.com/open-telemetry/opentelemetry-cpp-contrib/actions/runs/5989678879