Improve deprecation experience.

Update README.md (#193)

* Update README.md

Change the default branch in commands from master to main

* Update README.md

Version Compatibility Section (Changed master to main)

Deploy with auto build (#156)

* Use Node buildpack‘s auto build

* Remove NODE_ENV=development workaround since Node buildpack installs devDeps for build & auto-runs build.

* 📚 link to Dev Center for Node.js build customization

* Switch to new Node auto build behavior ahead of release

* Upgrade to "Node auto build" release version of inner buildpack

Default routing (#145)

Runtime vars compatibility with split bundles (#133)

* Runtime vars compatibility with split bundles

* 📚 split bundle compatibility

* Upgrade inner buildpack for split bundle compatibility

📚 notices about CRA 2 incompatibility

Support dyno metadata during build (#129)

Update README with latest release tag (#126)

Update README with latest release tag

Support for custom bundle location via `JS_RUNTIME_TARGET_BUNDLE` (#117)

* Support for custom bundle location via `JS_RUNTIME_TARGET_BUNDLE`

* 📚 about custom bundle location

* 📚 how to unset custom bundle path

* Upgrade to inner buildpack with improved custom bundle UX

Support for npm Private Modules (#96)