Add devcontainer POC to this project

[jvoravong]

Description:

• Readers should see DEVCONTAINER.md for an introduction and usage details.
  • This draft POC that introduces a Devcontainers integration within GitHub to amplify engineer productivity. It is an option that streamlines development setup, enforces consistency across environments, and embeds tools within a source-controlled framework.
  • Success of this POC can be measured by reduced dev or CI/CD setup times, fewer dev environment-specific issues, and quicker development iterations.
  • Installed tools include Go, Helm, Kubernetes, CLIs for popular Kubernetes distributions, Terraform, and etc.
• This POC hopes to foster a more collaborative and efficient ecosystem for contributors.
• Features
  • A devcontainer was added with needed developer and CI/CD tools
    • It currently takes about 757 seconds to build the devcontainer image
    • The total image size is ~30.5mb
  • Makefile actions were added to use the devcontainer
  • A github workflow was added so the devcontiner is published to the repository registry.
    • Example: "$ docker pull ghcr.io/jvoravong/splunk-otel-collector-chart/devcontainer:0.0.1"

[jvoravong]

Closing Notes:

• Devcontainers might be useful in the future, but adding it right now seems premature.
• Was able to the devcontainer to work with Visual Studio Code and Github codespaces.
• Was not able to get the devcontainer to work with Jetbrains IDEs. Jetbrains has added more support for devcontainers, but full and easy to use support is not there yet.