MM-16230 Add initial dev steps (#52)

* Add initial dev steps

* Update README.md

Co-Authored-By: Gabe Jackson <gabe@coffeepowered.co>

* Updates per feedback

README.md

@@ -15,3 +15,52 @@ This repository houses the open-source components of Mattermost Private Cloud. O
 ## Get Involved
 
 - [Join the discussion on Private Cloud](https://community.mattermost.com/core/channels/cloud)
+
+## Developing
+
+### Environment Setup
+
+1. Install [Go](https://golang.org/doc/install)
+2. Install [Terraform](https://learn.hashicorp.com/terraform/getting-started/install.html) version v0.11.14
+3. Install [kops](https://github.com/kubernetes/kops/blob/master/docs/install.md) version 1.12.X
+4. Install [Helm](https://helm.sh/docs/using_helm/)
+5. Install [kubectl](https://kubernetes.io/docs/tasks/tools/install-kubectl/)
+6. Generate an AWS Access and Secret key pair, then export them in your bash profile:
+  ```
+  export AWS_ACCESS_KEY_ID=YOURACCESSKEYID
+  export AWS_SECRET_ACCESS_KEY=YOURSECRETACCESSKEY
+  ```
+7. Create an S3 bucket to store the kops state
+8. Clone this repository into your GOPATH (or anywhere if you have Go Modules enabled)
+
+### Building
+
+Simply run the following:
+
+```
+$ go install ./cmd/cloud
+```
+
+### Running
+
+Before running the server the first time you must set up the DB with:
+
+```
+$ cloud schema migrate
+```
+
+To run the server you will need a certificate ARN, private and public Route53 IDs, and a private DNS from AWS. For staff developers you can get these in our dev AWS account.
+
+Run the server with:
+
+```
+$ cloud server --state-store=<your-s3-bucket> --private-dns dev.cloud.internal.mattermost.com --private-route53-id=<private-route53-id> --route53-id=<public-route53-id> --certificate-aws-arn <certifcate-aws-arn>
+```
+
+### Testing
+
+Run the go tests to test:
+
+```
+$ go test ./...
+```