fix: switch to node:20-slim for runner to fix persistent image optimization 400 errors

Dockerfile

@@ -56,15 +56,16 @@ ENV UV_THREADPOOL_SIZE=3
 RUN pnpm build
 
 # Stage 2: Runner
-FROM node:20-alpine AS runner
+FROM node:20-slim AS runner
 WORKDIR /app
 
-# Install dependencies for sharp and health checks
-RUN apk add --no-cache libc6-compat curl
+# Install curl for health checks and procps
+RUN apt-get update && apt-get install -y curl procps && rm -rf /var/lib/apt/lists/*
 
 # Create nextjs user and group
-RUN addgroup --system --gid 1001 nodejs && \
-    adduser --system --uid 1001 nextjs && \
+RUN groupadd --system --gid 1001 nodejs && \
+    useradd --system --uid 1001 nextjs && \
+    mkdir -p .next/cache/images && \
     chown -R nextjs:nodejs /app
 
 USER nextjs
@@ -72,11 +73,15 @@ USER nextjs
 ENV HOSTNAME="0.0.0.0"
 ENV PORT=3000
 ENV NODE_ENV=production
+ENV NEXT_SHARP_PATH=/app/node_modules/sharp
 
 # Copy standalone output
 COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
-# Copy public and static files into the expected locations
+# Copy public and static files - standalone expects them in specific locations
 COPY --from=builder --chown=nextjs:nodejs /app/public ./public
 COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
 
+# Ensure cache directory is writable for the nextjs user
+# (Already handled by chown -R above, but explicit is better)
+
 CMD ["node", "server.js"]

package.json

@@ -113,7 +113,7 @@
     "prepare": "husky",
     "preinstall": "npx only-allow pnpm"
   },
-  "version": "2.3.22-rc.15",
+  "version": "2.3.22-rc.16",
   "pnpm": {
     "onlyBuiltDependencies": [
       "@parcel/watcher",