Add a symlink to it from project’s node_modules/

To add a symlink to a file or folder from a project's node_modules directory, you can follow the steps below:

1. Open the command line or terminal.
2. Navigate to the project's root directory.
3. Run the following command:

   ln -s /path/to/file-or-folder node_modules/symlink-name

   Here, /path/to/file-or-folder is the absolute path to the file or folder you want to create a symlink for, and 
   symlink-name is the name you want to give to the symlink within the node_modules directory.

   For example, if you want to create a symlink for a file named example-file.js located in /home/user/some-folder, 
   and you want to name the symlink as example, the command would look like:

   ln -s /home/user/some-folder/example-file.js node_modules/example

4. After running the command, the symlink will be created in the node_modules directory of your project.

Note: The steps mentioned above assume you are using a Unix-like system. For Windows, the command and steps might be different.

Adding a symlink in this way allows you to reference the file or folder in your code using the symlink name, and any changes made to the 
original file or folder will be reflected in your project.