Adding design doc template (#462)

* Adding README

* Update README.md

* Update README.md

Updated title

Author: andrebriggs

technical-docs/designs/README.md

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+# Bedrock CLI Software Design Proposals
+
+## Summary
+
+Bedrock is a Microsoft open-source project focusing on Kubernetes deployment
+automation, observability, and infrastructure. This repository contains a CLI
+implementation of Bedrock concepts that are under constant design and
+implementation.
+
+When contributing a substantial design change we reccomend a design proposal.
+Below is a design proposal template with suggesteed headers to include in your
+design proposal to the Bedrock CLI.
+
+## Proposal Template
+
+### Design Proposal Title
+
+Reference: _What is this in reference to?_
+
+Authors: _Names of authors_
+
+| Revision | Date            | Author        | Remarks       |
+| -------: | --------------- | ------------- | ------------- |
+|      0.1 | Month-Day, Year | _Author Name_ | Initial Draft |
+
+### Overview
+
+_Briefly describe what the proposed design is attempting to achieve. Think about
+the job to be done. What is the goal?_
+
+### Out of Scope
+
+_Describe what is not relevant in this design. What are the non-goals?_
+
+### Design Details
+
+_Describe the design in detail. Consider staging the design into steps._
+
+### Dependencies
+
+_Describe what assumptions wee are making about dependencies in ordeer for your
+proposeed design to function correctly._
+
+### Risks & Mitigations
+
+_Describe risks and how we plans to overcome or handle them in the proposed
+design._
+
+### Documentation
+
+_Describe what documentation needs to be added or modified (if any)._
+
+### Appendix
+
+_Reference any additional artifacts (docs, images, links) that would help give context to the proposed design._