Update Contributor Guide

CONTRIBUTING.md

@@ -1,19 +1,30 @@
-# Contributing to Pulumi
+# Contributing to the Pulumi ecosystem
 
-Do you want to hack on Pulumi?  Awesome!  We are so happy to have you.
+Do you want to contribute to Pulumi? Awesome! We are so happy to have you.
+We have a few tips and housekeeping items to help you get up and running.
+
+## Code of Conduct
+
+Please make sure to read and observe our [Code of Conduct](./CODE-OF-CONDUCT.md)
+
+## Community Expectations
+
+Please read about our [contribution guidelines here.](https://github.com/pulumi/pulumi/blob/master/CONTRIBUTING.md#communications)
+
+## Setting up your development environment
+
+### Pulumi prerequisites
 
 Please refer to the [main Pulumi repo](https://github.com/pulumi/pulumi/)'s [CONTRIBUTING.md file](
-https://github.com/pulumi/pulumi/blob/master/CONTRIBUTING.md) for details on how to do so.
+https://github.com/pulumi/pulumi/blob/master/CONTRIBUTING.md#developing) for details on how to get set up with Pulumi.
 
 ## Committing Generated Code
 
-Code generated for Pulumi SDKs should be checked in as part of the pull request containing a
-particular change. To generate code after making changes, run `make` from the root of this
-repository.
+You must generate and check in the SDKs on each pull request containing a code change, e.g. adding a new resource to `resources.go`.
 
-If a large number of seemingly-unrelated diffs are produced by `make` (for example, lots of changes
-to comments unrelated to the change you are making), ensure that the latest dependencies for the
-provider are installed by running `make ensure` in the root of the repository.
+1. Run `make build_sdks` from the root of this repository
+1. Open a pull request containing all changes
+1. *Note:* If a large number of seemingly-unrelated diffs are produced by `make build_sdks` (for example, lots of changes to comments unrelated to the change you are making), ensure that the latest dependencies for the provider are installed by running `go mod tidy` in the `provider/` directory of this repository.
 
 ## Running Integration Tests