refactor: create docker-stack workspace for deployment configs

Created dedicated workspace for Docker deployment configurations and scripts.
Improves organization by grouping all deployment-related files together.

## New Structure
- docker-stack/: Docker Compose files and deployment scripts
  - docker-compose-standalone.yaml
  - docker-compose-swarm.yml
  - docker-compose-debug.yml
  - deploy-standalone.sh
  - deploy-swarm.sh
  - README.md (deployment documentation)
  - package.json

## Changes
- Moved all docker-compose YAML files to docker-stack/
- Moved deploy scripts to docker-stack/
- Updated VS Code workspace to include docker-stack
- Updated documentation (README, CLAUDE.md)

## Deployment Workflow
1. Build: `cd web-app && ./build.sh 2.20.0`
2. Deploy: `cd docker-stack && ./deploy-standalone.sh 2.20.0`

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

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

README.md

@@ -17,14 +17,15 @@ 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
+# Repository Structure
 
 This repository contains multiple independent projects:
 
 - **web-app/**: Next.js application for tracking utility bills
+- **docker-stack/**: Docker Compose configurations and deployment scripts
 - **housekeeping/**: Database backup and maintenance scripts
 
-Each project is self-contained with its own dependencies and package.json.
+Each project is self-contained with its own dependencies and configuration.
 
 ## Working with Projects
 
@@ -34,6 +35,10 @@ cd web-app
 npm install
 npm run dev
 
+# Deploy with Docker
+cd docker-stack
+./deploy-standalone.sh 2.20.0
+
 # Housekeeping scripts
 cd housekeeping
 ./db-backup--standalone.sh
@@ -128,9 +133,11 @@ The image will be stored in the local Docker instance.
 
 ## Deploying Docker Service
 
-From the repository root:
+From the `docker-stack/` directory:
 
 ```bash
+cd docker-stack
+
 # Standalone deployment
 ./deploy-standalone.sh 2.20.0