Fix base64 command in scripts/build-chart to provide -i explicitly to work on Macs

[aiyengar2]

Issue: https://github.com/rancher/prometheus-federator/issues/29

Problem

Running ./scripts/build on a Mac results in an error due to the base64 command not explicitly providing the filename as -i, instead relying on positional arguments.

Solution

Explicitly pass in -i. Works within a Docker container as well (verified by the fact that the Dapper build is passing).

Testing

Ran it locally

Versioning

For Community Members or Maintainers Making Changes

Please checkmark one of the boxes below to indicate you have following the versioning guidelines for rancher-project-monitoring:

• If you are introducing a change to packages/rancher-project-monitoring or packages/rancher-project-grafana:
  • [ ] Increment the patch version in the version of packages/rancher-project-monitoring/charts/Chart.yaml by 1
• [x] I am not introducing a change to package/rancher-project-monitoring

Note: We do not use RC versions for rancher-project-monitoring since it is hidden anyways and not intended for standalone use

Please checkmark one of the boxes below to indicate that you have followed the versioning guidelines for prometheus-federator:

• If you are introducing a change to main.go or packages/rancher-project-monitoring (including a change introduced in the above step):
  • [ ] If packages/prometheus-federator/charts/Chart.yaml has a version that is a -rc version, increment the -rc version in this file by one (i.e. 0.1.2-rc1 -> 0.1.2-rc2). Modify the appVersion to match this new version. Modify the helmProjectOperator.image.tag in packages/prometheus-federator/charts/values.yaml to match this appVersion.
  • [ ] If packages/prometheus-federator/charts/Chart.yaml has a version that is not a -rc version, increment the patch version in this file by 1 and add -rc1 (i.e. 0.1.1 -> 0.1.2-rc1). Modify the appVersion to match this new version. Modify the helmProjectOperator.image.tag in packages/prometheus-federator/charts/values.yaml to match this appVersion.
• If you are only introducing a change to packages/prometheus-federator:
  • [ ] If packages/prometheus-federator/charts/Chart.yaml has a version that is a -rc version, increment the -rc version in this file by one (i.e. 0.1.2-rc1 -> 0.1.2-rc2). Do not modify the appVersion or the helmProjectOperator.image.tag in packages/prometheus-federator/charts/values.yaml.
  • [ ] If packages/prometheus-federator/charts/Chart.yaml has a version that is not a -rc version, increment the patch version by 1 in this file and add -rc1 (i.e. 0.1.1 -> 0.1.2-rc1). Do not modify the appVersion or the helmProjectOperator.image.tag in packages/prometheus-federator/charts/values.yaml.

For Maintainers Releasing The Chart On QA Validation

Please checkmark both of the boxes below to indicate that you have followed the versioning guidelines for prometheus-federator:

• [ ] The -rc tag has been removed from the version in packages/prometheus-federator/charts/Chart.yaml
• [ ] The -rc tag has been removed from the helmProjectOperator.image.tag in packages/prometheus-federator/charts/values.yaml

Engineering Testing

Manual Testing

Automated Testing

QA Testing Considerations

Regressions Considerations