Update CONTRIBUTING.md (#2525)

This PR tries to update contributing.md to add a little more structure and make it clear the different ways to contribute.

CONTRIBUTING.md

@@ -1,8 +1,29 @@
 # Contributing
+
 Thanks for your interest in contributing to OpenDevin! We welcome and appreciate contributions. 
-If you are only looking to setup a development workflow, check out [Development.md](https://github.com/OpenDevin/OpenDevin/blob/main/Development.md).
 
-## Contribution Guide
+## How Can I Contribute?
+
+There are many ways that you can contribute:
+
+1. **Download and use** OpenDevin, and send [issues](https://github.com/OpenDevin/OpenDevin/issues) when you encounter something that isn't working or a feature that you'd like to see.
+2. **Send feedback** after each session by [clicking the thumbs-up thumbs-down buttons](https://opendevin.github.io/OpenDevin/modules/usage/feedback), so we can see where things are working and failing, and also build an open dataset for training code agents.
+3. **Improve the Codebase** by sending PRs (see details below). In particular, we have some [good first issue](https://github.com/OpenDevin/OpenDevin/labels/good%20first%20issue) issues that may be ones to start on.
+
+## Understanding OpenDevin's CodeBase
+
+In order to understand the codebase, please refer to the README in each module:
+- [frontend](./frontend/README.md)
+- [agenthub](./agenthub/README.md)
+- [evaluation](./evaluation/README.md)
+- [opendevin](./opendevin/README.md)
+    - [server](./opendevin/server/README.md)
+
+When you write code, it is also good to write tests. Please navigate to the `tests` folder to see existing test suites.
+At the moment, we have two kinds of tests: `unit` and `integration`. Please refer to the README for each test suite. These tests also run on github's continuous integration to ensure quality of the project.
+
+## Sending Pull Requests to OpenDevin
+
 ### 1. Fork the Official Repository
 Fork the [OpenDevin repository](https://github.com/OpenDevin/OpenDevin) into your own account.
 Clone your own forked repository into your local environment:
@@ -12,6 +33,7 @@ git clone git@github.com:<YOUR-USERNAME>/OpenDevin.git
 ```
 
 ### 2. Configure Git
+
 Set the official repository as your [upstream](https://www.atlassian.com/git/tutorials/git-forks-and-upstreams) to synchronize with the latest update in the official repository.
 Add the original repository as upstream:
 
@@ -38,10 +60,24 @@ git merge upstream/main
 git push origin main
 ```
 
-### 4. Create a New Branch And Open a Pull Request
-1. Create a new branch with your changes
-2. On Github, go to the page of your forked repository
-3. Create a Pull Request 
+### 4. Set up the Development Environment
+
+We have a separate doc [Development.md](https://github.com/OpenDevin/OpenDevin/blob/main/Development.md) that tells you how to set up a development workflow.
+
+### 5. Write Code and Commit It
+
+Once you have done this, you can write code, test it, and commit it to a branch (replace `my_branch` with an appropriate name):
+
+```shell
+git checkout -b my_branch
+git add .
+git commit
+git push origin my_branch
+```
+
+### 6. Open a Pull Request
+
+On Github, go to the page of your forked repository, and create a Pull Request 
     - Click on `Branches`
     - Click on the `...` beside your branch and click on `New pull request`
     - Set `base repository` to `OpenDevin/OpenDevin`
@@ -53,6 +89,7 @@ The PR should appear in [OpenDevin PRs](https://github.com/OpenDevin/OpenDevin/p
 Then the OpenDevin team will review your code.
 
 ## PR Rules
+
 ### 1. Pull Request title
 As described [here](https://github.com/commitizen/conventional-commit-types/blob/master/index.json), a valid PR title should begin with one of the following prefixes:
 
@@ -80,15 +117,3 @@ As described [here](https://github.com/OpenDevin/OpenDevin/labels), we have crea
 - If your PR is small (such as a typo fix), you can go brief.
 - If it contains a lot of changes, it's better to write more details.
 
-## How to Begin
-Please refer to the README in each module:
-- [frontend](./frontend/README.md)
-- [agenthub](./agenthub/README.md)
-- [evaluation](./evaluation/README.md)
-- [opendevin](./opendevin/README.md)
-    - [server](./opendevin/server/README.md)
-
-## Tests
-Please navigate to the `tests` folder to see existing test suites.
-At the moment, we have two kinds of tests: `unit` and `integration`. Please refer to the README for each test suite. These tests also run on CI to ensure quality of
-the project.