chore: upgrade Docker base images to Node.js 22 LTS Alpine (v2.7.22)

- Updated all Dockerfiles from node:20-alpine to node:22-alpine
- Addresses known vulnerabilities in older Alpine images
- Provides better long-term support with Node.js 22 LTS (until April 2027)
- Updated documentation to reflect new base image version
- Tested and verified compatibility with all dependencies

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Dockerfile

@@ -2,7 +2,7 @@
 # Ultra-optimized Dockerfile - minimal runtime dependencies (no n8n packages)
 
 # Stage 1: Builder (TypeScript compilation only)
-FROM node:20-alpine AS builder
+FROM node:22-alpine AS builder
 WORKDIR /app
 
 # Copy tsconfig for TypeScript compilation
@@ -22,7 +22,7 @@ COPY src ./src
 RUN npx tsc
 
 # Stage 2: Runtime (minimal dependencies)
-FROM node:20-alpine AS runtime
+FROM node:22-alpine AS runtime
 WORKDIR /app
 
 # Install only essential runtime tools

Dockerfile.railway

@@ -2,7 +2,7 @@
 # Railway-compatible Dockerfile for n8n-mcp
 
 # --- Stage 1: Builder ---
-FROM node:20-alpine AS builder
+FROM node:22-alpine AS builder
 WORKDIR /app
 
 # Install system dependencies for native modules
@@ -22,7 +22,7 @@ COPY src ./src
 RUN npm run build
 
 # --- Stage 2: Runtime ---
-FROM node:20-alpine AS runtime
+FROM node:22-alpine AS runtime
 WORKDIR /app
 
 # Install system dependencies

Dockerfile.test

@@ -1,5 +1,5 @@
 # Quick test Dockerfile using pre-built files
-FROM node:20-alpine
+FROM node:22-alpine
 
 WORKDIR /app
 

README.md

@@ -2,7 +2,7 @@
 
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 [![GitHub stars](https://img.shields.io/github/stars/czlonkowski/n8n-mcp?style=social)](https://github.com/czlonkowski/n8n-mcp)
-[![Version](https://img.shields.io/badge/version-2.7.21-blue.svg)](https://github.com/czlonkowski/n8n-mcp)
+[![Version](https://img.shields.io/badge/version-2.7.22-blue.svg)](https://github.com/czlonkowski/n8n-mcp)
 [![npm version](https://img.shields.io/npm/v/n8n-mcp.svg)](https://www.npmjs.com/package/n8n-mcp)
 [![n8n version](https://img.shields.io/badge/n8n-v1.103.2-orange.svg)](https://github.com/n8n-io/n8n)
 [![Docker](https://img.shields.io/badge/docker-ghcr.io%2Fczlonkowski%2Fn8n--mcp-green.svg)](https://github.com/czlonkowski/n8n-mcp/pkgs/container/n8n-mcp)

docker-compose.extract.yml

@@ -24,7 +24,7 @@ services:
 
   # Extractor service that will read from the mounted volumes
   node-extractor:
-    image: node:18-alpine
+    image: node:22-alpine
     container_name: n8n-node-extractor
     working_dir: /app
     depends_on:

docs/CHANGELOG.md

@@ -5,6 +5,21 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.7.22] - 2025-07-28
+
+### Security
+- **Docker base images**: Updated from Node.js 20 Alpine to Node.js 22 LTS Alpine
+  - Addresses known vulnerabilities in older Alpine images
+  - Provides better long-term support with Node.js 22 LTS (supported until April 2027)
+  - All Dockerfiles updated: `Dockerfile`, `Dockerfile.railway`, `Dockerfile.test`
+  - Docker Compose extractor service updated to use Node.js 22
+  - Documentation updated to reflect new base image version
+
+### Compatibility
+- Tested and verified compatibility with Node.js 22 LTS
+- All dependencies work correctly with the new Node.js version
+- Docker builds complete successfully with improved security posture
+
 ## [2.7.21] - 2025-07-23
 
 ### Updated
@@ -759,6 +774,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Basic n8n and MCP integration
 - Core workflow automation features
 
+[2.7.22]: https://github.com/czlonkowski/n8n-mcp/compare/v2.7.21...v2.7.22
+[2.7.21]: https://github.com/czlonkowski/n8n-mcp/compare/v2.7.20...v2.7.21
+[2.7.20]: https://github.com/czlonkowski/n8n-mcp/compare/v2.7.19...v2.7.20
 [2.7.19]: https://github.com/czlonkowski/n8n-mcp/compare/v2.7.18...v2.7.19
 [2.7.18]: https://github.com/czlonkowski/n8n-mcp/compare/v2.7.17...v2.7.18
 [2.7.17]: https://github.com/czlonkowski/n8n-mcp/compare/v2.7.16...v2.7.17

docs/DOCKER_README.md

@@ -482,7 +482,7 @@ secrets:
 
 ### Image Details
 
-- Base: `node:20-alpine`
+- Base: `node:22-alpine`
 - Size: ~280MB compressed
 - Features: Pre-built database with all node information
 - Database: Complete SQLite with 525+ nodes

package.json

@@ -1,6 +1,6 @@
 {
   "name": "n8n-mcp",
-  "version": "2.7.21",
+  "version": "2.7.22",
   "description": "Integration between n8n workflow automation and Model Context Protocol (MCP)",
   "main": "dist/index.js",
   "bin": {

package.runtime.json

@@ -1,6 +1,6 @@
 {
   "name": "n8n-mcp-runtime",
-  "version": "2.7.21",
+  "version": "2.7.22",
   "description": "n8n MCP Server Runtime Dependencies Only",
   "private": true,
   "dependencies": {