Use full node:22 image for frontend build stage

Alpine was causing native dependency issues with sass.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/Dockerfile

@@ -1,9 +1,9 @@
-FROM node:22-alpine AS build
+FROM node:22 AS build
 WORKDIR /app
 COPY package*.json ./
-RUN npm ci --ignore-scripts
+RUN npm ci
 COPY . .
-RUN NODE_OPTIONS="--max-old-space-size=1024" npm run build
+RUN npm run build
 
 FROM nginx:alpine
 COPY --from=build /app/dist /usr/share/nginx/html