Improve contributing guide (#358)

Author: badmonster0

.github/ISSUE_TEMPLATE/💡-feature-request.md

@@ -18,3 +18,7 @@ A clear and concise description of any alternative solutions or features you've
 
 **Additional context**
 Add any other context or screenshots about the feature request here.
+
+---
+[Contributing Guide](https://cocoindex.io/docs/about/contributing)
+For changes that takes more than a day, we recommend you to leave a comment on the issue like **`I'm working on it`**  or **`Can I work on this issue?`** to avoid duplicating work.

docs/docs/about/community.md

@@ -29,7 +29,7 @@ Join our community channels to get help, share ideas, and connect with other dev
 
 Need help? Here are the best ways to get support:
 
-- Email us at [support@cocoindex.io](mailto:support@cocoindex.io)
+- Email us at [hi@cocoindex.io](mailto:hi@cocoindex.io)
 - Check our [documentation](https://cocoindex.io/docs)
 - Read our [blog posts](https://cocoindex.io/blogs)
-- Ask questions in our Discord community 
+- Ask questions in our [Discord Server](https://discord.com/invite/zpA9S2DR7s)

docs/docs/about/contributing.md

@@ -5,9 +5,23 @@ description: Learn how to contribute to CocoIndex
 
 # Contributing
 
-We love contributions from our community! This guide explains how to get involved and contribute to CocoIndex.
+[CocoIndex](https://github.com/cocoindex-io/cocoindex) is an open source project. We are respectful, open and friendly. This guide explains how to get involved and contribute to [CocoIndex](https://github.com/cocoindex-io/cocoindex).
 
-## Setting Up Development Environment
+## Issues:
+
+We use [GitHub Issues](https://github.com/cocoindex-io/cocoindex/issues) to track bugs and feature requests.
+
+## Good First Issues
+
+We tag issues with the ["good first issue"](https://github.com/cocoindex-io/cocoindex/issues?q=is%3Aissue+is%3Aopen+label%3A%22good+first+issue%22) label for beginner contributors.
+
+## How to Contribute 
+- If you decide to work on an issue, unless the PR can be sent immediately (e.g. just a few lines of code), we recommend you to leave a comment on the issue like **`I'm working on it`**  or **`Can I work on this issue?`** to avoid duplicating work.
+- For larger features, we recommend you to discuss with us first in our [Discord server](https://discord.com/invite/zpA9S2DR7s) to coordinate the design and work.
+- Our [Discord server](https://discord.com/invite/zpA9S2DR7s) are constantly open. If you are unsure about anything, it is a good place to discuss! We'd love to collaborate and will always be friendly.
+
+## Start hacking! Setting Up Development Environment 
+Following the steps below to get cocoindex build on latest codebase locally - if you are making changes to cocoindex funcionality and want to test it out.
 
 -   Install Rust toolchain: [docs](https://rust-lang.org/tools/install)
 
@@ -48,7 +62,6 @@ To submit your code:
 In your PR description, please include:
 - Description of the changes
 - Motivation and context
-- Test coverage details
 - Note if it's a breaking change
 - Reference any related GitHub issues