chore: Deploy preview of a PR

[pratapaprasanna]

Successful-run: https://github.com/appsmithorg/appsmith-ci/actions/runs/3986060223

Example: appsmithorg#2

How to trigger the workflow

Reference

go ahead and comment:

/build-deploy-preview

If the commit is fine then you should another comment from github-actions like below

Tests running at: https://github.com/appsmithorg/appsmith-ci/actions/runs/xxxxxx
Workflow: On demand build Image and deploy Deploy-Preview.
PR: #.
URL: #ce.appsmith.com

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

1 Ignored Deployment

Name	Status	Preview	Comments	Updated
appsmith	⬜️ Ignored (Inspect)			Jan 26, 2023 at 8:21AM (UTC)

[what-the-diff]

• Added a new workflow to build and deploy the preview of PRs.
• The script is triggered by commenting "/build-deploy-preview" on any pull request in this repository, which emits a repository_dispatch event that triggers the workflow run.
• This will create an image with hash as tag from all three repositories (client, server & rts) and push it to docker hub organization repo appsmith/appsmith-ce: .
• Then using helm chart we are deploying these images into kubernetes cluster for testing purpose before merging them into master branch so that they can be tested properly without affecting production environment or other developers work who might have been working on different branches at same time but not yet merged their codebase into master branch due to some reason like bug fixes etc..