Update README.md contributor and release docs

.gitignore

@@ -14,3 +14,10 @@ tests/fixtures/drainpipe-test-project/*
 !.yarn/versions
 .npmrc
 lerna-debug.log
+
+################
+# Editors / OS #
+################
+.idea
+.DS_Store
+.vscode

README.md

@@ -8,29 +8,42 @@ for a Drupal site, including:
 - Automated testing setup
 - Integration with DDEV
 - CI integration
----
-* [Installation](#installation)
-* [Database Updates](#database-updates)
-* [.env support](#env-support)
-* [SASS Compilation](#sass-compilation)
-* [JavaScript Compilation](#javascript-compilation)
-* [Testing](#testing)
-    + [Static Tests](#static-tests)
-    + [Functional Tests](#functional-tests)
-        - [PHPUnit](#phpunit)
-        - [Nightwatch](#nightwatch)
-    + [Autofix](#autofix)
-* [Hosting Provider Integration](#hosting-provider-integration)
-    + [Generic](#generic)
-    + [Pantheon](#pantheon)
-* [GitHub Actions Integration](#github-actions-integration)
-    + [Composer Lock Diff](#composer-lock-diff)
-    + [Pantheon](#pantheon-1)
-* [GitLab CI Integration](#gitlab-ci-integration)
-    + [Composer Lock Diff](#composer-lock-diff-1)
-    + [Pantheon](#pantheon-2)
-* [Tugboat Integration](#tugboat)
----
+
+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+**Table of Contents**  *generated with [DocToc](https://github.com/thlorenz/doctoc)*
+
+- [Installation](#installation)
+- [Database Updates](#database-updates)
+- [.env support](#env-support)
+- [SASS Compilation](#sass-compilation)
+  - [Setup](#setup)
+- [JavaScript Compilation](#javascript-compilation)
+  - [Setup](#setup-1)
+- [Testing](#testing)
+  - [Static Tests](#static-tests)
+    - [Excluding Files from PHP_CodeSniffer](#excluding-files-from-php_codesniffer)
+  - [Functional Tests](#functional-tests)
+    - [PHPUnit](#phpunit)
+    - [Nightwatch](#nightwatch)
+  - [Autofix](#autofix)
+- [Hosting Provider Integration](#hosting-provider-integration)
+  - [Generic](#generic)
+    - [Importing/Exporting Databases](#importingexporting-databases)
+    - [Snapshots](#snapshots)
+  - [Pantheon](#pantheon)
+- [GitHub Actions Integration](#github-actions-integration)
+  - [Composer Lock Diff](#composer-lock-diff)
+  - [Pantheon](#pantheon-1)
+- [GitLab CI Integration](#gitlab-ci-integration)
+  - [Composer Lock Diff](#composer-lock-diff-1)
+  - [Pantheon](#pantheon-2)
+- [Tugboat](#tugboat)
+- [Contributor Docs](#contributor-docs)
+- [Release](#release)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
 ## Installation
 
 ```sh
@@ -612,3 +625,47 @@ php:
   screenshot:
   visualdiff:
 ```
+
+## Contributor Docs
+
+This repo is public.
+
+Please be careful to remove sensitive customer specifics when posting Issues or comments.
+
+First time contributors need a maintainers approval for automated tests to run.
+(This is so we aren't at risk of getting a big CI bill accidentally, or maliciously.)
+
+Peer Reviewing by looking at PR code changes is nice.
+
+Testing PR code changes on real sites is extra beneficial.
+
+## Release
+
+### Drainpipe and Drainpipe-dev release process
+
+When making a release, increase the version based on https://semver.org/
+
+> MAJOR version when you make incompatible API changes
+> MINOR version when you add functionality in a backward compatible manner
+> PATCH version when you make backward compatible bug fixes
+
+Specifically for drainpipe, when a new "check" is added, that might break builds in projects,
+that would usually be a MINOR release, with a release note about the change.
+
+Before making a new release, post in the lullabot internal #devops slack channel to coordinate with other maintainers.
+
+1. Generate a GitHub release for drainpipe
+  1. Supply the correct tag based on the changes and semantic versioning standards.
+  2. Use the suggested release notes.
+  3. Set this release as latest and publish.
+2. The release when published will automatically kick off a release of [drainpipe-dev](https://github.com/Lullabot/drainpipe) using the [DrainpipeDev GitHub workflow](https://github.com/Lullabot/drainpipe/actions/workflows/DrainpipeDev.ym). However this needs some manual followups:
+  1. This action ends up creating a branch in drainpipe-dev with the same name as the tag you just entered in the release.
+  2. Delete the branch that was created in drainpipe-dev.
+  3. Create a release with the same tag name in drainpipe-dev and in the release notes, just link to the drainpipe release that was made in step 1.
+
+### NPM package release process
+
+To generate new NPM package releases:
+
+1. Have the latest main branch checked out locally
+2. Run `yarn learna publish`