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>

README.md

@@ -17,46 +17,69 @@ Each location record is marked with a user ID.
 
 All the actions user `withUser` to fetch user ID, which is then used in all the DB operations.
 
+# Monorepo Structure
+
+This project is organized as a monorepo with multiple workspaces:
+
+- **web-app**: The main Next.js application for tracking utility bills
+- **housekeeping**: Database backup and maintenance scripts
+
+## Working with Workspaces
+
+From the monorepo root:
+
+```bash
+# Run dev server
+npm run dev
+
+# Build the web app
+npm run build
+
+# Run database backup (standalone)
+npm run backup:standalone --workspace=housekeeping
+```
+
 # Database Backup & Restore
 
 The project includes multiple backup strategies for different deployment scenarios and requirements.
+All backup scripts are located in the `housekeeping/` workspace.
 
 ## Backup Scripts Overview
 
 ### Standalone Docker Deployments
 
 **Online Backups (No Downtime):**
-- `db-dump--standalone.sh` - Creates online backup of the 'utility-bills' database using mongodump
+- `housekeeping/db-dump--standalone.sh` - Creates online backup of the 'utility-bills' database using mongodump
   - Database stays running during backup
   - Only backs up the database content, not the full volume
   - Output: `./mongo-backup/utility-bills-dump-YYYY-MM-DD_HH-MM.tar.gz`
   - Default retention: 7 backups (configurable via `KEEP` env var)
-  - Usage: `./db-dump--standalone.sh` or `KEEP=10 ./db-dump--standalone.sh`
+  - Usage: `cd housekeeping && ./db-dump--standalone.sh` or `KEEP=10 ./db-dump--standalone.sh`
 
-- `db-restore-from-dump--standalone.sh` - Restores from mongodump archives
+- `housekeeping/db-restore-from-dump--standalone.sh` - Restores from mongodump archives
   - Database stays running during restore
   - **WARNING**: Drops existing collections before restore
-  - Usage: `./db-restore-from-dump--standalone.sh utility-bills-dump-2025-11-26_14-30.tar.gz`
+  - Usage: `cd housekeeping && ./db-restore-from-dump--standalone.sh utility-bills-dump-2025-11-26_14-30.tar.gz`
 
 **Offline Backups (With Downtime):**
-- `db-backup--standalone.sh` - Creates offline backup of the complete mongo-volume directory
+- `housekeeping/db-backup--standalone.sh` - Creates offline backup of the complete mongo-volume directory
   - Database container is stopped during backup for consistency
   - Backs up the entire MongoDB data directory
   - Output: `./mongo-backup/mongo-volume-backup-YYYY-MM-DD-HH-MM.tar.gz`
   - Default retention: 7 backups (configurable via `KEEP` env var)
-  - Usage: `./db-backup--standalone.sh` or `KEEP=2 ./db-backup--standalone.sh`
+  - Usage: `cd housekeeping && ./db-backup--standalone.sh` or `KEEP=2 ./db-backup--standalone.sh`
 
 ### Docker Swarm Deployments
 
-- `db-backup--swarm.sh` - Creates offline backup by scaling down the MongoDB service
+- `housekeeping/db-backup--swarm.sh` - Creates offline backup by scaling down the MongoDB service
   - Service is scaled to 0 during backup
   - Output: `./mongo-backup/mongo-volume-backup-YYYY-MM-DD-HH-MM.tar.gz`
-  - Usage: `./db-backup--swarm.sh`
+  - Usage: `cd housekeeping && ./db-backup--swarm.sh`
 
-- `db-restore-from-backup--swarm.sh` - Restores volume backup by scaling down the service
+- `housekeeping/db-restore-from-backup--swarm.sh` - Restores volume backup by scaling down the service
   - Service is scaled to 0 during restore
   - Optional `--pre-backup` flag for safety backup before restore
-  - Usage: `./db-restore-from-backup--swarm.sh mongo-volume-backup-2025-11-26-14-30.tar.gz`
+  - Usage: `cd housekeeping && ./db-restore-from-backup--swarm.sh mongo-volume-backup-2025-11-26-14-30.tar.gz`
 
 ## Automated Backup Schedule
 
@@ -64,10 +87,10 @@ Backups run automatically via cron at 04:00 every day:
 
 ```cron
 # Sunday: Full volume backup (offline), keep 2 backups
-0 4 * * 0 cd /home/knee-cola/web-pro/evidencija-rezija && KEEP=2 ./db-backup--standalone.sh
+0 4 * * 0 cd /home/knee-cola/web-pro/evidencija-rezija/housekeeping && KEEP=2 ./db-backup--standalone.sh
 
 # Monday-Saturday: Database dump (online), keep 6 backups
-0 4 * * 1-6 cd /home/knee-cola/web-pro/evidencija-rezija && KEEP=6 ./db-dump--standalone.sh
+0 4 * * 1-6 cd /home/knee-cola/web-pro/evidencija-rezija/housekeeping && KEEP=6 ./db-dump--standalone.sh
 ```
 
 **Backup Strategy:**