Move the contributing to .github templates

[viferga]

Is your feature request related to a problem? Please describe.
Recently @vr-varad did a PR about how to contribute to this repo, and this is polluting the core info in the readme, the ideal would be to create a contribute template with this info. I am leaving the info here.

## How to Contribute

### Starting Stack

- Clone the repository:

    ```bash
    git clone https://github.com/metacall/landing-page.git
    cd landing-page
    ```

### How to Run

1. Install `docsify-cli` globally:

    ```bash
    npm install docsify-cli -g
    ```

2. Initialize docsify in the "./docs" directory:

    ```bash
    docsify init ./docs
    ```

3. Run the local server with docsify:

    ```bash
    docsify serve docs
    ```

    You can now preview your site in your browser by navigating to [http://localhost:3000](http://localhost:3000).

[viferga]

Done: #14 (comment)