Feature: Added Talawa-admin to run system daemon service in Linux

INSTALLATION.md

@@ -16,6 +16,11 @@ This document provides instructions on how to set up and start a running instanc
 - [Installation using Docker](#installation-using-docker)
   - [Prerequisites](#prerequisites-1)
     - [Development Setup](#development-setup)
+- [Talawa-Admin Service Setup Guide](#talawa-admin-service-setup-guide)
+  - [Prerequisites](#prerequisites-2)
+    - [Service Configuration](#service-configuration)
+    - [Steps to Enable and Manage the Service](#steps-to-enable-and-manage-the-service)
+    - [Troubleshooting](#troubleshooting)
 
 <!-- tocstop -->
 
@@ -380,3 +385,108 @@ If you don't want this hook to run, you can manually opt out of this using the `
 
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 ```
+
+# Talawa-Admin Service Setup Guide
+
+This guide outlines the steps to set up and manage the Talawa-Admin service on a Linux server using `systemd`.
+
+## Prerequisites
+
+1. Firstly, You should have locally setup the Talawa-Admin repo using [Setting up this repository](#setting-up-this-repository)
+2. Ensure **Node.js** and **npm** are correctly installed and available for the specified user and group.
+3. It’s recommended to use **nvm** (Node Version Manager) for better management of different Node.js versions.
+4. Ensure you have root or sudo access to configure systemd services.
+5. Create a dedicated service user:
+   ```bash
+   sudo useradd -r -s /bin/false talawa_admin
+   sudo groupadd -r talawa_admin
+   sudo usermod -a -G talawa_admin talawa_admin
+   # Get the absolute path to your talawa-admin installation
+   INSTALL_PATH=$(pwd)
+
+   sudo chown -R talawa_admin:talawa_admin $INSTALL_PATH
+   sudo chmod 750 $INSTALL_PATH
+   sudo find $INSTALL_PATH -type f -exec chmod 640 {} \;
+   sudo chmod 600 $INSTALL_PATH/.env
+   ```
+
+---
+
+### Service Configuration
+These steps below will help you setup the Linux Daemon Service for Talawa-Admin Project.
+Please make sure to follow these step in sequence.
+
+1. **Copy the `talawa_admin.service` file**
+   - Place the `talawa_admin.service` file in the appropriate systemd directory based on your Linux distribution:
+      - For most distributions: `/etc/systemd/system/`
+      - For systems using `systemd`, this will be the default directory.
+
+   <!-- Optional Steps -->
+   - Verify service file permissions and ownership:
+   ```bash
+   sudo chmod 644 /etc/systemd/system/talawa_admin.service
+   sudo chown root:root /etc/systemd/system/talawa_admin.service
+   sudo systemd-analyze verify talawa_admin.service
+   ```
+
+2. **Verify the CODEROOT Path**
+   - Ensure that the `CODEROOT` environment variable matches the absolute path to the Talawa-Admin code directory.
+
+3. **Set the Correct Working Directory**
+   - Always use the absolute path for the `WorkingDirectory`. Do **not** use `$CODEROOT` in the `WorkingDirectory` field.
+
+4. **Ensure the `.env` File Exists**
+   - Verify that the path in the `EnvironmentFile` line points to a valid `.env` file located in the root directory of the Talawa-Admin repository.
+
+   <!-- Optional Steps -->
+   - Validate environment file permissions and configuration:
+   ```bash
+   sudo chmod 600 /path/to/talawa-admin/.env
+   sudo chown talawa_admin:talawa_admin /path/to/talawa-admin/.env
+   # Verify environment variables are loaded
+   sudo systemctl show-environment
+
+   ```
+
+5. **Adjust User and Group**
+   - Modify the `User` and `Group` settings to match the user account intended to run the service.
+
+---
+
+### Steps to Enable and Manage the Service
+
+1. **Reload the systemd daemon** to apply changes:
+   ```bash
+   sudo systemctl daemon-reload
+   ```
+
+2. **Start the Talawa-Admin Service**:
+   ```bash
+   sudo systemctl start talawa_admin.service
+   # Verify service started successfully
+   sudo systemctl status talawa_admin.service
+   ```
+
+3. **Stop the Talawa-Admin Service**:
+   ```bash
+   sudo systemctl stop talawa_admin.service
+   ```
+
+4. **Enable the Service to Start on Boot**:
+   ```bash
+   sudo systemctl enable talawa_admin.service
+   ```
+
+---
+
+### Troubleshooting
+
+- If you encounter any issues, you can check the status and logs of the service:
+  ```bash
+  sudo systemctl status talawa_admin.service
+  sudo journalctl -u talawa_admin.service
+  ```
+
+---
+
+By following these steps, you can set up and manage the Talawa-Admin service efficiently on your Linux server.

examples/linux/systemd/talawa_admin.service

@@ -0,0 +1,63 @@
+################################################################################
+#
+# READ ALL STEPS BEFORE PROCEEDING
+#
+# 0) Ensure that Node.js and npm are correctly installed and available for the 
+#    specified user and group.
+#    Use nvm for better interaction with different node versions.
+# 1) Place this file in the appropriate systemd directory based on your Linux
+#    distribution, e.g., /etc/systemd/system/.
+# 2) Verify the CODEROOT path matches the Talawa-Admin code directory.
+# 3) Always add the absolute path of talawa-admin directory to WorkingDirectory don't use $CODEROOT. 
+# 4) Ensure the EnvironmentFile path points to a valid .env file for the service.
+# 5) Adjust the User and Group to match the user account intended to run the service.
+# 6) Run the command "sudo systemctl daemon-reload" after saving changes.
+# 7) Use "sudo systemctl start talawa_admin.service" to start the service.
+# 8) Use "sudo systemctl stop talawa_admin.service" to stop the service.
+# 9) Use "sudo systemctl enable talawa_admin.service" to start the service on boot.
+#
+################################################################################
+
+[Unit]
+Description=Talawa-Admin Service
+After=network.target
+
+[Service]
+User=talawa_admin
+Group=talawa_admin
+Environment=CODEROOT=path/to/your/talawa-admin
+Environment=NODE_ENV=production
+
+# Absolute path is needed for working directory
+WorkingDirectory=/path/to/your/talawa-admin
+
+################################################################################
+# No need to edit anything below here
+################################################################################
+
+EnvironmentFile=$CODEROOT/.env
+ExecStart=/bin/bash -c '\
+  if [ -f "$HOME/.nvm/nvm.sh" ]; then \
+    . "$HOME/.nvm/nvm.sh" && \
+    if nvm use default; then \
+      exec npm run serve \
+    else \
+      echo "Failed to set Node.js version" >&2; \
+      exit 1; \
+    fi \
+  else \
+    echo "NVM not found" >&2; \
+    exit 1; \
+  fi'
+
+Restart=on-failure
+RemainAfterExit=yes
+ProtectSystem=full
+NoNewPrivileges=true
+PrivateTmp=true
+Type=simple
+RuntimeDirectory=talawa-admin
+
+
+[Install]
+WantedBy=multi-user.target