GITBOOK-95: abdousfayhi12's Nov 20 changes

docs/developer-guide/setup-node.js-with-nvm.md

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+# Setup Node.js with NVM
+
+Node.js is a pre-requisite to run both the Hexabot CLI and a Hexabot project since the API is built on NestJS. Using [NVM](https://github.com/nvm-sh/nvm) (Node Version Manager) simplifies managing the required Node.js version. When creating a new Hexabot project, the structure includes source folders like **extensions** to add custom plugins, helpers and channels, making Node.js essential tool for smooth development and customization.
+
+If you are new to NVM, please follow these steps to install:
+
+1. Update the system:
+
+```bash
+sudo apt update
+```
+
+2. Install NVM:
+
+```bash
+curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.1/install.sh | bash
+```
+
+Close and reopen your terminal to start using nvm or run the following to use it now:
+
+```bash
+export NVM_DIR="$HOME/.nvm"
+[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
+[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion
+```
+
+3. Verify the NVM installation:
+
+```bash
+nvm --version
+```
+
+4. Install Node.js version 18.17.0 or higher :
+
+```bash
+nvm install 18.17.0
+```
+
+5. Check default Node.js version:
+
+```bash
+node --version
+```