chore: Updated README install instructions (#16)

Author: Justinon

README.md

@@ -19,15 +19,21 @@
 
 `tools/ci/deploy/deploy.ts` handles asynchronous+simultaneous deployments to a group of beanstalk environments. It does this by creating an Application Version (one per Beanstalk Application only) from an artifact in S3 followed by issuing deployments of that Application Version to each respective beanstalk environment in the group.
 
-### Installation
+The library can be pulled from GitHub Packages.
+
+### Authentication
+
+> ***TL;DR:*** Follow the [abridged instructions](https://github.com/time-loop/cdk-library#setup-github-packages-access) written in cdk-library.
 
-To install the package in a project (especially locally), you'll first need to setup a GitHub PAT since this package is hosted in GitHub Packages. General instructions to do so can be [found here](https://docs.github.com/en/[email protected]/authentication/keeping-your-account-and-data-secure/creating-a-personal-access-token).
+You need to setup scoped access to GitHub Packages in your `~/.npmrc`. To do so, create a GitHub PAT with scope `read:packages`. With such a limited scope, setting expiry to `never` is permissible. Canonical instructions to do this can be [found here](https://docs.github.com/en/[email protected]/authentication/keeping-your-account-and-data-secure/creating-a-personal-access-token).
 
-> ***NOTE:*** If you are working with a GitHub Workflow, the provided `GITHUB_TOKEN` might Just Work for you as this is a public package. However, if you also need to access packages that are private to your org, you might consider adding an `ALL_PACKAGE_READ_TOKEN` org secret followed by populating your .npmrc appropriately.
+> NOTE: If you are working with a GitHub Workflow, the provided `GITHUB_TOKEN` might Just Work for you as this is a public package. However, if you also need to access packages that are private to your org, you might consider adding an `ALL_PACKAGE_READ_TOKEN` org secret followed by populating your .npmrc appropriately.
 
-Once created with at least `read:package` and `repo` access, in your project follow these steps under [Installing a Package](https://itnext.io/setting-up-github-packages-for-npm-2bc9f8e4b11e) where `@yourcompany` is `@time-loop`.
+After creating a PAT, follow [canonical instructions to setup your authentication to GitHub Packages](https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-npm-registry).
+
+### Installation
 
-Then, install with `npm` in your project like so:
+Use `npm` or any relevant package manager in your project like so:
 
 ```bash
 # --save-dev is optional, depending on whether this is used in the main app or