Create basic contribution doc (#22)

Fixes hyperlane-xyz/hyperlane-monorepo#2178

.github/pull_request_template.md

@@ -0,0 +1,21 @@
+### Description
+
+#### Type: <New | Updated> <Network | Warp Route>
+
+#### Network(s): <Network Name(s)>
+
+#### Other notes
+
+### Backward compatibility
+
+<!--
+Are these changes backward compatible? Note, additions are backwards compatible.
+
+Yes/No
+-->
+
+### Testing
+
+<!--
+Have any new metadata configs and deployment addresses been used with any Hyperlane tooling, such as the CLI?
+-->

CONTRIBUTING.md

@@ -0,0 +1,20 @@
+# Contributing
+
+This registry is maintained by the core Hyperlane team, but community members are encouraged to add chain and deployment information here!
+
+## Benefits
+
+By adding chain metadata, deployment addresses, and other information here, you make it easier to use with Hyperlane tooling, such as the [Explorer](https://explorer.hyperlane.xyz) and the [CLI](https://docs.hyperlane.xyz/docs/reference/cli). For example, users will be able to search for messages to chains using [Permissionless Interoperability](https://docs.hyperlane.xyz/docs/reference/glossary#permissionless-interoperability) without having to specify the metadata themselves.
+
+## Process
+
+1. Fork and clone the registry repository
+2. Use the CLI and set the `--registry` flag to the local path of the cloned repository
+3. Execute your commands as needed, such as `hyperlane deploy core --registry <YOUR_URI>`
+4. Push your changes to your fork and create a pull request
+
+Once you've opened a PR, the Hyperlane team will review it. If it meets the requirements, it will be merged into the registry.
+
+## Documentation
+
+For more information about Hyperlane Registries see the [documentation](https://docs.hyperlane.xyz/docs/reference/registries).

README.md

@@ -1,6 +1,6 @@
 # Hyperlane Registry
 
-A collection of configs, artifacts, and schemas for Hyperlane.
+A collection of configs, artifacts, and schemas for Hyperlane. See the [documentation](https://docs.hyperlane.xyz/docs/reference/registries) for more information.
 
 ## Contents
 
@@ -11,8 +11,6 @@ Structured as a folder for each chain. Each folder should contain a `metadata.ya
 
 ### Deployments
 
-**WORK IN PROGRESS: Note, the shape and contents of the deployments folders are subject to change**
-
 #### Core
 
 Configs and artifacts for [Hyperlane Core Contract](https://docs.hyperlane.xyz/docs/deploy/deploy-hyperlane) deployments.
@@ -21,17 +19,6 @@ Configs and artifacts for [Hyperlane Core Contract](https://docs.hyperlane.xyz/d
 
 Address artifacts for [Warp Route](https://docs.hyperlane.xyz/docs/deploy/deploy-warp-route) token deployments.
 
-## Usage
-
-### Via the NPM package
-
-```sh
-# With npm
-npm install @hyperlane-xyz/registry
-# Or with yarn
-yarn add @hyperlane-xyz/registry
-```
-
-### Via SDK utilities
+## Contributing
 
-_Coming soon!_
+This registry is maintained by the core Hyperlane team but community members are encouraged to add chain and deployment information here! See the [Contribution Guide](./CONTRIBUTING.md) for more information.