Provide builds for more platforms

[matheuscscp]

Improve docker build to provide support for more platforms, e.g. linux/arm64. See reference: https://github.com/matheuscscp/json-logger-server/blob/2d419479a5858dd93fff05c135caabbba4a0deda/.github/workflows/release.yml#L40-L49

Remove nodeSelector: {kubernetes.io/arch: amd64} after adding arm64 builds.