feat: contributing guidelines

CONTRIBUTING.md

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+# Contributing to Kaizen
+
+Thank you for your interest in contributing to Kaizen! We're excited to have you join our community. This document will guide you through the process of contributing to our project.
+
+For more information on how to contribute to Kaizen, please refer to the [Contributing Guide](https://kaizen-docs.cloudcode.ai/contributing/overview).
+
+## Table of Contents
+
+1. [Code of Conduct](#code-of-conduct)
+2. [Getting Started](#getting-started)
+3. [Development Setup](#development-setup)
+4. [How to Contribute](#how-to-contribute)
+5. [Pull Request Process](#pull-request-process)
+6. [Style Guide](#style-guide)
+7. [Setting Up Language Models](#setting-up-language-models)
+8. [Community Guidelines](#community-guidelines)
+
+## Code of Conduct
+
+We are committed to providing a welcoming and inclusive environment for all contributors. Please read and follow our [Code of Conduct](https://kaizen-docs.cloudcode.ai/contributing/code_of_conduct).
+
+## Getting Started
+
+1. Fork the repository to your GitHub account.
+2. Clone your fork to your local machine:
+   ```bash
+   git clone https://github.com/your-username/kaizen.git
+   cd kaizen
+   ```
+3. Add the original repository as an upstream remote:
+   ```bash
+   git remote add upstream https://github.com/Cloud-Code-AI/kaizen.git
+   ```
+
+## Development Setup
+
+1. Install dependencies:
+   ```bash
+   poetry install
+   ```
+2. Copy the `.env.example` file to create a new `.env` file:
+   ```bash
+   cp .env.example .env
+   ```
+3. Fill in the necessary environment variables in the `.env` file.
+4. Create and configure the `config.json` file in the root directory. Refer to the [Setting Up Language Models](#setting-up-language-models) section for details.
+
+## How to Contribute
+
+1. Find an issue to work on or create a new one if you have a feature idea.
+2. Create a new branch for your work:
+   ```bash
+   git checkout -b feature/your-feature-name
+   ```
+3. Make your changes, following our [Style Guide](#style-guide).
+4. Write or update tests as necessary.
+5. Run tests to ensure all pass:
+   ```bash
+   pytest .
+   ```
+6. Commit your changes with a clear and concise commit message.
+7. Push your branch to your fork:
+   ```bash
+   git push origin feature/your-feature-name
+   ```
+8. Open a pull request against the main repository.
+
+## Pull Request Process
+
+1. Ensure any install or build dependencies are removed before the end of the layer when doing a build.
+2. Update the README.md with details of changes to the interface, including new environment variables, exposed ports, useful file locations, and container parameters.
+3. Increase the version numbers in any examples files and the README.md to the new version that this Pull Request would represent.
+4. Your pull request will be reviewed by maintainers, who may request changes or improvements.
+5. Once approved, your PR will be merged into the main branch.
+
+## Style Guide
+
+- Use [Prettier](https://prettier.io/) for code formatting.
+- Follow the [Airbnb JavaScript Style Guide](https://github.com/airbnb/javascript) for JavaScript code.
+- Use [Conventional Commits](https://www.conventionalcommits.org/) for commit messages.
+- For CSS/SCSS:
+  - Use kebab-case for class names (e.g., `.my-class-name`).
+  - Avoid using IDs for styling.
+  - Use variables for colors, fonts, and other repeated values.
+
+## Setting Up Language Models
+
+To configure Language Models (LLMs) for your project, update the `config.json` file in the root directory. Here's a basic structure:
+
+```json
+{
+    "language_model": {
+        "provider": "litellm",
+        "enable_observability_logging": true,
+        "redis_enabled": true,
+        "models": [
+            {
+                "model_name": "default",
+                "litellm_params": {
+                    "model": "gpt-4o-mini",
+                    "input_cost_per_token": 0.000000015,
+                    "output_cost_per_token": 0.0000006
+                }
+            }
+        ]
+    },
+    "github_app": {
+        "check_signature": false,
+        "auto_pr_review": true,
+        "edit_pr_desc": true,
+        "process_on_push": true,
+        "auto_unit_test_generation": false
+    }
+}
+```
+
+Refer to the [Setting Various LLMs](https://kaizen-docs.cloudcode.ai/contributing/setting_various_llms) guide for more detailed configuration options.
+
+## Community Guidelines
+
+- Be respectful and inclusive in your interactions with other contributors.
+- Participate in discussions and help other contributors.
+- If you have questions or need help, don't hesitate to ask in our [Community Chat](https://discord.com/invite/zvYZukgeH2).
+
+Thank you for contributing to Kaizen! Your efforts help make our software better for everyone.