Add new nodejs module (#165)

Co-authored-by: Mathias Fredriksson <mafredri@gmail.com>

Author: TheZoker

.icons/node.svg

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+---
+display_name: nodejs
+description: Install Node.js via nvm
+icon: ../.icons/node.svg
+maintainer_github: TheZoker
+verified: false
+tags: [helper]
+---
+
+# nodejs
+
+Automatically installs [Node.js](https://github.com/nodejs/node) via [nvm](https://github.com/nvm-sh/nvm). It can also install multiple versions of node and set a default version. If no options are specified, the latest version is installed.
+
+```tf
+module "nodejs" {
+  source   = "registry.coder.com/modules/nodejs/coder"
+  version  = "1.0.2"
+  agent_id = coder_agent.example.id
+}
+```
+
+### Install multiple versions
+
+This installs multiple versions of Node.js:
+
+```tf
+module "nodejs" {
+  source   = "registry.coder.com/modules/nodejs/coder"
+  version  = "1.0.2"
+  agent_id = coder_agent.example.id
+  node_versions = [
+    "18",
+    "20",
+    "node"
+  ]
+  default_node_version = "20"
+}
+```
+
+### Full example
+
+A example with all available options:
+
+```tf
+module "nodejs" {
+  source             = "registry.coder.com/modules/nodejs/coder"
+  version            = "1.0.2"
+  agent_id           = coder_agent.example.id
+  nvm_version        = "v0.39.7"
+  nvm_install_prefix = "/opt/nvm"
+  node_versions = [
+    "16",
+    "18",
+    "node"
+  ]
+  default_node_version = "16"
+}
+```

nodejs/README.md

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+import { describe, expect, it } from "bun:test";
+import { runTerraformInit, testRequiredVariables } from "../test";
+
+describe("nodejs", async () => {
+  await runTerraformInit(import.meta.dir);
+
+  testRequiredVariables(import.meta.dir, {
+    agent_id: "foo",
+  });
+
+  // More tests depend on shebang refactors
+});

nodejs/main.test.ts

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+terraform {
+  required_version = ">= 1.0"
+
+  required_providers {
+    coder = {
+      source  = "coder/coder"
+      version = ">= 0.12"
+    }
+  }
+}
+
+variable "agent_id" {
+  type        = string
+  description = "The ID of a Coder agent."
+}
+
+variable "nvm_version" {
+  type        = string
+  description = "The version of nvm to install."
+  default     = "master"
+}
+
+variable "nvm_install_prefix" {
+  type        = string
+  description = "The prefix to install nvm to."
+  default     = "$HOME/.nvm"
+}
+
+variable "node_versions" {
+  type        = list(string)
+  description = "A list of Node.js versions to install."
+  default     = ["node"]
+}
+
+variable "default_node_version" {
+  type        = string
+  description = "The default Node.js version"
+  default     = "node"
+}
+
+resource "coder_script" "nodejs" {
+  agent_id     = var.agent_id
+  display_name = "Node.js:"
+  script = templatefile("${path.module}/run.sh", {
+    NVM_VERSION : var.nvm_version,
+    INSTALL_PREFIX : var.nvm_install_prefix,
+    NODE_VERSIONS : join(",", var.node_versions),
+    DEFAULT : var.default_node_version,
+  })
+  run_on_start       = true
+  start_blocks_login = true
+}

nodejs/main.tf

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+#!/usr/bin/env bash
+
+NVM_VERSION='${NVM_VERSION}'
+NODE_VERSIONS='${NODE_VERSIONS}'
+INSTALL_PREFIX='${INSTALL_PREFIX}'
+DEFAULT='${DEFAULT}'
+BOLD='\033[0;1m'
+CODE='\033[36;40;1m'
+RESET='\033[0m'
+
+printf "$${BOLD}Installing nvm!$${RESET}\n"
+
+export NVM_DIR="$${INSTALL_PREFIX}/nvm"
+
+script="$(curl -sS -o- "https://raw.githubusercontent.com/nvm-sh/nvm/$${NVM_VERSION}/install.sh" 2>&1)"
+if [ $? -ne 0 ]; then
+  echo "Failed to download nvm installation script: $script"
+  exit 1
+fi
+
+output="$(bash <<< "$script" 2>&1)"
+if [ $? -ne 0 ]; then
+  echo "Failed to install nvm: $output"
+  exit 1
+fi
+
+printf "🥳 nvm has been installed\n\n"
+
+# Set up nvm for the rest of the script.
+[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh"
+
+# Install each node version...
+IFS=',' read -r -a VERSIONLIST <<< "$${NODE_VERSIONS}"
+for version in "$${VERSIONLIST[@]}"; do
+  if [ -z "$version" ]; then
+    continue
+  fi
+  printf "🛠️ Installing node version $${CODE}$version$${RESET}...\n"
+  output=$(nvm install "$version" 2>&1)
+  if [ $? -ne 0 ]; then
+    echo "Failed to install version: $version: $output"
+    exit 1
+  fi
+done
+
+# Set default if provided
+if [ -n "$${DEFAULT}" ]; then
+  printf "🛠️ Setting default node version $${CODE}$DEFAULT$${RESET}...\n"
+  output=$(nvm alias default $DEFAULT 2>&1)
+fi