chore(deps): upgrade Docker base images from Node 20 to Node 22 LTS

Closed Dependabot PRs #87-91 (suggested Node 25, non-LTS).
Updated all 7 Dockerfiles to Node 22 LTS (current Active LTS).

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

Author: jeremylongshore

apps/api/Dockerfile

@@ -2,7 +2,7 @@
 # Multi-tenant REST API for the GWI SaaS platform
 
 # Build stage
-FROM node:20-alpine AS builder
+FROM node:22-alpine AS builder
 
 WORKDIR /app
 
@@ -44,7 +44,7 @@ RUN npm run build --workspace=@gwi/engine
 RUN npm run build --workspace=@gwi/api
 
 # Production stage
-FROM node:20-alpine AS runner
+FROM node:22-alpine AS runner
 
 WORKDIR /app
 

apps/cli/Dockerfile

@@ -13,7 +13,7 @@
 #     -v $(pwd):/workspace \
 #     gwi-cli triage https://github.com/owner/repo/pull/123
 
-FROM node:20-alpine AS builder
+FROM node:22-alpine AS builder
 
 # Install build dependencies
 RUN apk add --no-cache python3 make g++
@@ -37,7 +37,7 @@ COPY packages ./packages
 RUN npm run build --workspace=apps/cli
 
 # Production stage
-FROM node:20-alpine
+FROM node:22-alpine
 
 # Security: Run as non-root user
 RUN addgroup -g 1001 -S gwi && \

apps/gateway/Dockerfile

@@ -2,7 +2,7 @@
 # R3: Cloud Run as gateway only (proxy to Agent Engine via REST)
 
 # Build stage
-FROM node:20-alpine AS builder
+FROM node:22-alpine AS builder
 
 WORKDIR /app
 
@@ -44,7 +44,7 @@ RUN npm run build --workspace=@gwi/engine
 RUN npm run build --workspace=@gwi/gateway
 
 # Production stage
-FROM node:20-alpine AS runner
+FROM node:22-alpine AS runner
 
 WORKDIR /app
 

apps/github-webhook/Dockerfile

@@ -3,7 +3,7 @@
 # R3: Cloud Run as gateway only (no agent logic)
 
 # Build stage
-FROM node:20-alpine AS builder
+FROM node:22-alpine AS builder
 
 WORKDIR /app
 
@@ -45,7 +45,7 @@ RUN npm run build --workspace=@gwi/engine
 RUN npm run build --workspace=@gwi/github-webhook
 
 # Production stage
-FROM node:20-alpine AS runner
+FROM node:22-alpine AS runner
 
 WORKDIR /app
 

apps/mcp-server/Dockerfile

@@ -3,7 +3,7 @@
 # Hard Mode R3: Gateway Separation
 # This is a REST proxy only - does NOT run agent Runners locally
 
-FROM node:20-slim AS base
+FROM node:22-slim AS base
 WORKDIR /app
 
 # Install dependencies only when needed

apps/webhook-receiver/Dockerfile

@@ -6,7 +6,7 @@
 # Optimized for fast startup and small image size.
 
 # Build stage
-FROM node:20-alpine AS builder
+FROM node:22-alpine AS builder
 
 WORKDIR /app
 
@@ -43,7 +43,7 @@ RUN npm run build --workspace=@gwi/core
 RUN npm run build --workspace=@gwi/webhook-receiver
 
 # Production stage
-FROM node:20-alpine AS runner
+FROM node:22-alpine AS runner
 
 WORKDIR /app
 

apps/worker/Dockerfile

@@ -2,7 +2,7 @@
 # Phase 35: Background job processor for autopilot workflows
 
 # Build stage
-FROM node:20-alpine AS builder
+FROM node:22-alpine AS builder
 
 WORKDIR /app
 
@@ -47,7 +47,7 @@ RUN npm run build --workspace=@gwi/engine
 RUN npm run build --workspace=@gwi/worker
 
 # Production stage
-FROM node:20-alpine AS runner
+FROM node:22-alpine AS runner
 
 WORKDIR /app