refactor: convert repository to monorepo with npm workspaces

Restructured the repository into a monorepo to better organize application code
and maintenance scripts.

## Workspace Structure
- web-app: Next.js application (all app code moved from root)
- housekeeping: Database backup and maintenance scripts

## Key Changes
- Moved all application code to web-app/ using git mv
- Moved database scripts to housekeeping/ workspace
- Updated Dockerfile for monorepo build process
- Updated docker-compose files (volume paths: ./web-app/etc/hosts/)
- Updated .gitignore for workspace-level node_modules
- Updated documentation (README.md, CLAUDE.md, CHANGELOG.md)

## Migration Impact
- Root package.json now manages workspaces
- Build commands delegate to web-app workspace
- All file history preserved via git mv
- Docker build process updated for workspace structure

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Dockerfile

@@ -12,17 +12,20 @@ RUN apk add --no-cache libc6-compat
 
 WORKDIR /app
 
-# package.json and package-lock.json
+# Copy monorepo root package files
 COPY ./package.json ./package-lock.json ./
 
-# installing dependencies
+# Copy workspace package files
+COPY ./web-app/package.json ./web-app/package-lock.json ./web-app/
+
+# Install dependencies (workspaces)
 RUN npm i && npm cache clean --force
 
-# copy all the soruce code
-COPY . .
+# Copy web-app source code
+COPY ./web-app ./web-app
 
-# building app
-RUN npm run build
+# Build web-app workspace
+RUN npm run build --workspace=web-app
 
 #-----------------------------------------
 # STAGE 3: Run the Next.js server
@@ -34,14 +37,14 @@ WORKDIR /app
 # making sure the production server does not use mock auth
 ENV NODE_ENV=production
 
-COPY --from=builder /app/public/* /app/public/
+COPY --from=builder /app/web-app/public/* /app/public/
 # this file is required for the pdfjs-dist package
 COPY --from=builder /app/node_modules/pdfjs-dist/build/pdf.worker.min.mjs /app/public/pdf.worker.min.mjs
 
 # Automatically leverage output traces to reduce image size
 # https://nextjs.org/docs/advanced-features/output-file-tracing
-COPY --from=builder --chown=nonroot:nonroot /app/.next/standalone ./
-COPY --from=builder --chown=nonroot:nonroot /app/.next/static ./.next/static
+COPY --from=builder --chown=nonroot:nonroot /app/web-app/.next/standalone ./
+COPY --from=builder --chown=nonroot:nonroot /app/web-app/.next/static ./.next/static
 
 USER nonroot