GTM Server Installer 🧩

This script installs a self-hosted Google Tag Manager Server-Side container using Docker, Nginx, and Certbot, allowing full control over your tagging environment with custom domains.

📦 What it does

• ✅ Prompts for project name, container config, and domains
• ✅ Dynamically assigns available ports (starting from 8080+)
• ✅ Creates isolated folder at /opt/<project_name>
• ✅ Optionally installs dependencies (nginx, certbot, docker-compose)
• ✅ Sets up Docker containers for preview + production
• ✅ Configures Nginx reverse proxy with healthcheck
• ✅ Offers automatic SSL certificate generation via Let's Encrypt
• ✅ New: Updates existing installations to the latest version

⚙️ Requirements

• Ubuntu 20.04+ with root access
• Docker & Docker Compose (optional: script can install)
• 2 subdomains pointed to your server IP:
  • gtm-preview.example.com
  • gtm.example.com

🚀 Usage

1️⃣ New Installation

To install a new GTM server instance:

sudo bash installer.sh

Follow the prompts:

• Project Name: e.g., gtm-contaideal
• Config: Paste your base64 Container Config
• Domains: Enter preview and production domains

2️⃣ Update a Specific GTM Container

To update an existing project (e.g., gtm-contaideal) to the latest version (4.0.0):

sudo bash installer.sh --update

When prompted, enter the project name you want to update:

Enter the project name to update (e.g. gtm-contaideal): gtm-contaideal

The script will:

1. Pull the latest 4.0.0 Docker image.
2. Gracefully restart the containers for that specific project.

3️⃣ SSL Setup

To set up SSL after DNS propagation:

sudo bash installer.sh --ssl

Enter the project name when prompted.