docs: add Docker volume setup instructions to README

- Add production volume creation commands (slc_postgres_prod_data, slc_logs_prod)
- Document volume purposes and file paths
- Add production log access commands
- Fix Quick Start section numbering

README.md

@@ -125,7 +125,25 @@ Web application (PWA) enabling dance event participants to:
 ### Prerequisites
 - Docker and Docker Compose
 
-### 1. Start the application
+### 1. Setup production volumes (one-time setup)
+
+Production environment requires persistent external Docker volumes for database and logs:
+
+```bash
+# Create production database volume
+docker volume create slc_postgres_prod_data
+
+# Create production logs volume
+docker volume create slc_logs_prod
+```
+
+These volumes persist data across container restarts and are used by:
+- `slc_postgres_prod_data` - PostgreSQL database files
+- `slc_logs_prod` - Application and nginx logs (accessible at `/var/log/app/` and `/var/log/nginx-app/`)
+
+**Note:** Development profile uses auto-created volumes (no manual setup needed).
+
+### 2. Start the application
 
 ```bash
 # Clone repository
@@ -138,11 +156,15 @@ cp backend/.env.example backend/.env
 # Start development mode
 docker compose --profile dev up
 
+# Start production mode (requires volumes from step 1)
+docker compose --profile prod up
+
 # Open browser
-http://localhost:8080
+http://localhost:8080  # Development
+http://localhost       # Production
 ```
 
-### 2. Seed the database
+### 3. Seed the database
 
 ```bash
 # Seed with development data (includes test users, events, heats)
@@ -152,7 +174,7 @@ make seed-dev
 docker compose exec backend npm run prisma:seed:dev
 ```
 
-### 3. Test the application
+### 4. Test the application
 
 Use seeded accounts:
 - **Admin:** admin@spotlight.cam / [password set during seed]
@@ -192,6 +214,10 @@ docker compose exec backend npm test -- matching-algorithm.test.js
 # Admin CLI
 make dev-cli               # Interactive REPL
 docker compose exec backend npm run cli -- users:list --limit 20
+
+# Production logs (persistent across restarts)
+docker exec slc-backend-prod tail -f /var/log/app/backend.log
+docker exec slc-proxy-prod tail -f /var/log/nginx-app/nginx.log
 ```
 
 ---