Maintenance log book app — initial scaffold

Multi-department fault log: NewBook-synced room locations + manual
locations with categories, six-state task flow (submitted/in progress/
hold-parts/hold-later/temporary fix/fixed), photos per stage, priorities
with unusable flag and per-task NewBook out-of-order push, costs on
resolve, comment/audit thread, recurring task templates with
note-to-template carryover, asset register, contractor register with
document attachments, staff/contractor allocation, occupancy-aware
summary filter, searchable history with CSV export, email notifications.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

backend/Dockerfile

@@ -0,0 +1,8 @@
+FROM node:22-alpine
+WORKDIR /app
+COPY package.json .
+RUN npm install --omit=dev
+COPY src ./src
+RUN mkdir -p /app/uploads
+EXPOSE 3001
+CMD ["node", "src/index.js"]