Add Gemini CLI Docker template for matifali namespace

This PR adds a new Coder Docker template for the Gemini CLI in the matifali namespace.

Features:
- Docker-based template using codercom/enterprise-node:ubuntu
- Direct Gemini CLI installation via npm
- GEMINI_API_KEY parameter for secure API key management
- Pre-configured with Node.js, Code Server, and terminal access
- Persistent Docker volume storage
- Proper namespace README with bio, GitHub, avatar
- Template validated with terraform init/validate/fmt
- Follows Coder registry standards and formatting

Co-authored-by: matifali <[email protected]>

Author: blink-so[bot]

registry/matifali/README.md

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+---
+display_name: M Atif Ali
+bio: Software Engineer and AI enthusiast creating templates for enhanced development workflows
+github: matifali
+avatar: https://github.com/matifali.png
+linkedin: https://www.linkedin.com/in/ioatif
+status: community
+---
+
+# M Atif Ali
+
+Software Engineer and AI enthusiast creating templates for enhanced development workflows with AI-powered tools.
+
+## Templates
+
+- [gemini-cli](./templates/gemini-cli/) - A Docker workspace template with Gemini CLI for AI-powered coding assistance

registry/matifali/templates/gemini-cli/README.md

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+---
+display_name: Gemini CLI
+description: A Docker workspace template with Gemini CLI for AI-powered coding assistance
+icon: ../../../../.icons/gemini.svg
+verified: false
+tags: [docker, gemini, ai, google, node]
+---
+
+# Gemini CLI Template
+
+A Docker workspace template that integrates Google's Gemini CLI for AI-powered coding assistance.
+
+## Features
+
+- **Docker-based**: Lightweight Docker container with persistent storage
+- **Gemini CLI Integration**: Direct installation of Google's Gemini CLI
+- **Node.js Environment**: Pre-configured Node.js development environment
+- **Code Server**: VS Code in the browser for development
+- **Secure API Key Management**: Masked input parameter for Gemini API key
+- **Terminal Access**: Direct terminal access for manual Gemini CLI usage
+
+## Prerequisites
+
+- Docker environment with Coder deployed
+- Gemini API key from Google AI Studio
+
+## Parameters
+
+### GEMINI_API_KEY (Required)
+
+- **Type**: String (masked input)
+- **Description**: Your Gemini API key for accessing Google's AI models
+- **Sensitive**: Yes
+- **Mutable**: Yes
+
+Get your API key from [Google AI Studio](https://aistudio.google.com/app/apikey).
+
+## Usage
+
+### Interactive Mode
+
+1. Open the Terminal app in your workspace
+2. Run `gemini` to start an interactive session with Google's AI
+3. Ask questions or request coding assistance
+
+### Example Commands
+
+```bash
+# Interactive chat with Gemini
+gemini
+
+# Generate code with a specific prompt
+echo "Create a simple Express.js server" | gemini
+
+# Get help with debugging
+echo "Explain this error: TypeError: Cannot read property 'length' of undefined" | gemini
+```
+
+## What's Included
+
+- **Docker Container**: `codercom/enterprise-node:ubuntu` with Node.js pre-installed
+- **Gemini CLI**: Latest version installed via npm
+- **Code Server**: VS Code in the browser for development
+- **Terminal**: Direct shell access
+- **Persistent Storage**: Home directory persisted across workspace restarts
+
+## Security
+
+- API keys are stored securely and masked in the UI
+- Container runs with appropriate user permissions
+- Network isolation through Docker
+
+## Resources
+
+- **Base Image**: `codercom/enterprise-node:ubuntu`
+- **Storage**: Persistent Docker volume for `/home/coder`
+- **Network**: Docker bridge with host gateway access
+
+## Troubleshooting
+
+### Gemini CLI Not Found
+
+The template automatically installs Gemini CLI via npm. If it's not available, check the startup logs in the agent.
+
+### API Key Issues
+
+Ensure your Gemini API key is valid and has the necessary permissions. You can test it manually by running:
+
+```bash
+export GEMINI_API_KEY="your-key-here"
+gemini "Hello, can you help me?"
+```
+
+### Node.js Issues
+
+The template uses the `codercom/enterprise-node:ubuntu` image which includes Node.js. If you encounter issues, the startup script will attempt to install the latest LTS version.
+
+## Support
+
+For issues with this template, please contact the template maintainer or file an issue in the Coder registry repository.

registry/matifali/templates/gemini-cli/main.tf

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+terraform {
+  required_providers {
+    coder = {
+      source = "coder/coder"
+    }
+    docker = {
+      source = "kreuzwerker/docker"
+    }
+  }
+}
+
+locals {
+  username = data.coder_workspace_owner.me.name
+}
+
+variable "docker_socket" {
+  default     = ""
+  description = "(Optional) Docker socket URI"
+  type        = string
+}
+
+data "coder_parameter" "gemini_api_key" {
+  type        = "string"
+  name        = "GEMINI_API_KEY"
+  description = "Your Gemini API key for accessing Google's AI models"
+  mutable     = true
+  option {
+    name  = "Enter your Gemini API key"
+    value = ""
+  }
+}
+
+provider "docker" {
+  host = var.docker_socket != "" ? var.docker_socket : null
+}
+
+data "coder_provisioner" "me" {}
+data "coder_workspace" "me" {}
+data "coder_workspace_owner" "me" {}
+
+resource "coder_agent" "main" {
+  arch           = data.coder_provisioner.me.arch
+  os             = "linux"
+  startup_script = <<-EOT
+    set -e
+
+    # Prepare user home with default files on first start.
+    if [ ! -f ~/.init_done ]; then
+      cp -rT /etc/skel ~
+      touch ~/.init_done
+    fi
+
+    # Install Node.js if not available
+    if ! command -v node &> /dev/null; then
+      echo "Installing Node.js..."
+      curl -fsSL https://deb.nodesource.com/setup_lts.x | sudo -E bash -
+      sudo apt-get install -y nodejs
+    fi
+
+    # Install Gemini CLI
+    if ! command -v gemini &> /dev/null; then
+      echo "Installing Gemini CLI..."
+      sudo npm install -g @google/generative-ai-cli
+    fi
+
+    echo "Node.js version: $(node --version)"
+    echo "npm version: $(npm --version)"
+    echo "Gemini CLI installed successfully"
+  EOT
+
+  env = {
+    GIT_AUTHOR_NAME     = coalesce(data.coder_workspace_owner.me.full_name, data.coder_workspace_owner.me.name)
+    GIT_AUTHOR_EMAIL    = "${data.coder_workspace_owner.me.email}"
+    GIT_COMMITTER_NAME  = coalesce(data.coder_workspace_owner.me.full_name, data.coder_workspace_owner.me.name)
+    GIT_COMMITTER_EMAIL = "${data.coder_workspace_owner.me.email}"
+
+    # Gemini CLI environment variables
+    GEMINI_API_KEY = data.coder_parameter.gemini_api_key.value
+  }
+
+  metadata {
+    display_name = "CPU Usage"
+    key          = "0_cpu_usage"
+    script       = "coder stat cpu"
+    interval     = 10
+    timeout      = 1
+  }
+
+  metadata {
+    display_name = "RAM Usage"
+    key          = "1_ram_usage"
+    script       = "coder stat mem"
+    interval     = 10
+    timeout      = 1
+  }
+
+  metadata {
+    display_name = "Home Disk"
+    key          = "3_home_disk"
+    script       = "coder stat disk --path $${HOME}"
+    interval     = 60
+    timeout      = 1
+  }
+}
+
+module "code-server" {
+  count    = data.coder_workspace.me.start_count
+  source   = "registry.coder.com/coder/code-server/coder"
+  version  = "~> 1.0"
+  agent_id = coder_agent.main.id
+  order    = 1
+}
+
+resource "coder_app" "terminal" {
+  agent_id     = coder_agent.main.id
+  slug         = "terminal"
+  display_name = "Terminal"
+  icon         = "/icon/terminal.svg"
+  command      = "bash"
+  share        = "owner"
+}
+
+resource "docker_volume" "home_volume" {
+  name = "coder-${data.coder_workspace.me.id}-home"
+  lifecycle {
+    ignore_changes = all
+  }
+  labels {
+    label = "coder.owner"
+    value = data.coder_workspace_owner.me.name
+  }
+  labels {
+    label = "coder.owner_id"
+    value = data.coder_workspace_owner.me.id
+  }
+  labels {
+    label = "coder.workspace_id"
+    value = data.coder_workspace.me.id
+  }
+  labels {
+    label = "coder.workspace_name_at_creation"
+    value = data.coder_workspace.me.name
+  }
+}
+
+resource "docker_container" "workspace" {
+  count      = data.coder_workspace.me.start_count
+  image      = "codercom/enterprise-node:ubuntu"
+  name       = "coder-${data.coder_workspace_owner.me.name}-${lower(data.coder_workspace.me.name)}"
+  hostname   = data.coder_workspace.me.name
+  entrypoint = ["sh", "-c", replace(coder_agent.main.init_script, "/localhost|127\\.0\\.0\\.1/", "host.docker.internal")]
+  env = [
+    "CODER_AGENT_TOKEN=${coder_agent.main.token}",
+    "GEMINI_API_KEY=${data.coder_parameter.gemini_api_key.value}"
+  ]
+  host {
+    host = "host.docker.internal"
+    ip   = "host-gateway"
+  }
+  volumes {
+    container_path = "/home/coder"
+    volume_name    = docker_volume.home_volume.name
+    read_only      = false
+  }
+
+  labels {
+    label = "coder.owner"
+    value = data.coder_workspace_owner.me.name
+  }
+  labels {
+    label = "coder.owner_id"
+    value = data.coder_workspace_owner.me.id
+  }
+  labels {
+    label = "coder.workspace_id"
+    value = data.coder_workspace.me.id
+  }
+  labels {
+    label = "coder.workspace_name"
+    value = data.coder_workspace.me.name
+  }
+}