fix(docker): fix EACCES on .next/cache/images — chown for nextjs user

Dockerfile

@@ -5,7 +5,7 @@ WORKDIR /app
 # --- Install + Build in one stage ---
 FROM base AS builder
 # CACHE_BUST: change this value to force a full rebuild (busts Docker layer cache)
-ARG CACHE_BUST=8
+ARG CACHE_BUST=9
 RUN echo "Cache bust: ${CACHE_BUST}"
 COPY . .
 RUN pnpm install --no-frozen-lockfile
@@ -32,6 +32,10 @@ ENV NEXT_TELEMETRY_DISABLED=1
 COPY --from=builder /app/ ./
 
 RUN addgroup --system --gid 1001 nodejs && adduser --system --uid 1001 nextjs
+
+# Ensure Next.js cache directories are writable by the nextjs user
+RUN mkdir -p /app/apps/web/.next/cache && chown -R nextjs:nodejs /app/apps/web/.next/cache
+
 USER nextjs
 
 EXPOSE 3000