Release `3.0.0`

[marcelosalloum]

Release Checklist

Attention: the examples below use the version x.y.z but you should update them to use the version you're releasing.

Git Preparation

• [x] Decide on a version number based on the current version number and the common rules defined in Semantic Versioning. E.g. x.y.z.
• [x] Update this ticket name to reflect the new version number, following the pattern "Release x.y.z".
• [x] Cut a branch for the new release out of the develop branch, following the gitflow naming pattern release/3.0.0.

Code Preparation

• [x] Update the code to use this version number.
  • [x] Update version and appVersion in helmchart/sdp/Chart.yaml.
  • [x] Update the constant Version in main.go
• [x] Update the CHANGELOG.md file with the new version number and release notes.
• [x] Run tests and linting, and make sure the version running in the default branch is working end-to-end. At least the minimal end-to-end manual tests is mandatory.
• [x] 🚨 DO NOT RELEASE before holidays or weekends! Mondays and Tuesdays are preferred.

Merging the Branches

• [x] When the team is confident the release is stable, you'll need to create two pull requests:
  • [x] release/x.y.z -> main: 🚨 Do not squash-and-merge! This PR should be merged with a merge commit. #475
  • [x] release/x.y.z -> develop: this should be merged after the main branch is merged. 🚨 Do not squash-and-merge! This PR should be merged with a merge commit. #476

Publishing the Release

• [x] After the release branch is merged to main, create a new release on GitHub with the name x.y.z and the use the same changes from the CHANGELOG.md file – v3.0.0
  • [x] The release should automatically publish a new version of the docker image to Docker Hub. stellar/stellar-disbursement-platform-backend:3.0.0
• [x] Propagate the helmchart version update to the https://github.com/stellar/helm-charts repository. – https://github.com/stellar/helm-charts/pull/104#pullrequestreview-2462764164