Update documentation

CHANGELOG.md

+# Changelog
+
+## TechPreview0615 - 2020-06-15
+Anchore Engine version - 0.7.1
+

CODEOWNERS

+* @big-bang

CONTRIBUTING.md

+# Contributing
+
+Thanks for contributing to this repository!
+
+This repository follows the following conventions:
+
+* [Keep a Changelog](https://keepachangelog.com/)
+* [Conventional Commits](https://www.conventionalcommits.org/)
+
+Development requires the Kubernetes CLI tool as well as a local Kubernetes cluster. [KIND](https://github.com/kubernetes-sigs/kind) is recommended as a lightweight local option for standing up Kubernetes clusters.
+
+To contribute a change:
+
+1. Create a branch on the cloned repository with a descriptive name, prefixed with your name. For example, `gd/add-ingress` is an appropriate branch name.
+2. Make the changes in code.
+3. Write tests using [KUTTL](https://kuttl.dev) and [Conftest](https://conftest.dev)
+4. Make commits using the [Conventional Commits](https://www.conventionalcommits.org/) format. This helps with automation for changelog. Update `CHANGELOG.md` in the same commit using the [Keep a Changelog](https://keepachangelog.com). Depending on tooling maturity, this step may be automated.
+5. Open a merge request using one of the provided templates. If this merge request is solving a preexisting issue, add the issue reference into the description of the MR.
+6. During this time, ensure that all new commits are rebased into your branch so that it remains up to date with the `development` branch.
+7. Wait for a maintainer of the repository (see CODEOWNERS) to approve.
+8. If you have permissions to merge, you are responsible for merging. Otherwise, a CODEOWNER will merge the commit.

README.md

+## Anchore Engine  Version 0.7.1
+
+This repo contains manifests that deploy the Anchore Engine container image analysis system. Anchore Engine requires a PostgreSQL database for which the connection information needs to be provided. Anchore executes in a service based architecture utilizing the following Anchore Engine services: External API, SimpleQueue, Catalog, Policy Engine, and Analyzer.
+
+
+### Pre-requisites
+
+* Kubernetes cluster deployed
+* kubectl configuration installed
+
+Install kubectl
+
+```
+brew install kubectl
+```
+
+Install kustomize
+
+```
+brew install kustomize
+```
+
 ## Template Generation
 
 ```
@@ -103,4 +125,7 @@ spec:
             name: db-credentials
       restartPolicy: OnFailure
 
-```
\ No newline at end of file
+```
+## Contributing
+
+To contribute to Anchore, see the [Contributing Guide](CONTRIBUTING.md).