Update 'README'

Author: SeiyaKobayashi

README.md

@@ -47,7 +47,7 @@ $ yarn
 To run yarn scripts defined in workspaces, run the following.
 
 ```sh
-$ yarn workspace <workspace name> run <command name>
+$ yarn workspace ${workspace_name} run ${command_name}
 ```
 
 ### Dependencies
@@ -56,23 +56,23 @@ To add dependencies, run one of the following. To prevent unexpected behaviors,
 
 ```sh
 # Add dependencies to the specified workspace
-$ yarn workspace <workspace name> add -E <dependencies>
+$ yarn workspace ${workspace_name} add -E ${dependencies}
 
 # Add dev dependencies to the specified workspace
-$ yarn workspace <workspace name> add -E -D <dependencies>
+$ yarn workspace ${workspace_name} add -E -D ${dependencies}
 
 # Add dev dependencies to the workspaces root
-$ yarn add -E -D -W <dependencies>
+$ yarn add -E -D -W ${dependencies}
 ```
 
 To remove dependencies, run one of the following.
 
 ```sh
 # Remove dependencies from the specified workspace
-$ yarn workspace <workspace name> remove <dependencies>
+$ yarn workspace ${workspace_name} remove ${dependencies}
 
 # Remove dependencies from the workspaces root
-$ yarn remove -W <dependencies>
+$ yarn remove -W ${dependencies}
 ```
 
 ### Documentation
@@ -85,4 +85,32 @@ $ yarn run docs
 
 ## 🔥 How to Contribute
 
-Feel free to create new issues from [here](https://github.com/jcam1/sdks/issues/new/choose) to propose/request new features or report bugs.
+We appreciate your interest to contribute to this project! Please read the following steps to see how to contribute to this project.
+
+### 1. Create an Issue
+
+The first thing to do is to create a new issue. Feel free to create new issues from [here](https://github.com/jcam1/sdks/issues/new/choose) to propose/request new features or report bugs.
+
+### 2. Clone This Repository
+
+Next, clone this repo. Our default branch is `develop`.
+
+```sh
+$ git clone --recursive https://github.com/jcam1/sdks.git
+```
+
+### 3. Checkout to a New Branch
+
+You then need to checkout to a new branch (name whatever you would like) from the cloned `develop` branch.
+
+```sh
+$ git checkout -b ${your_branch_name}
+```
+
+### 4. Write Code
+
+Now, write code to implement the proposed features and/or to fix bugs.
+
+### 5. Open a Pull Request
+
+Finally, open a new PR from your branch to `develop` branch to describe what you'll have done.