Add example environment configuration file

.env.example

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+# .env.example
+# Copy this file to .env and update the values below
+
+## Domain / Timezone
+DOMAIN=your-domain.com
+TZ=Your/Timezone
+
+## ACME (Let's Encrypt)
+# Your email address for Let's Encrypt certificate notifications
+ACME_EMAIL=admin@your-domain.com
+
+## Namecheap DNS API (whitelist your VPS IP in Namecheap API settings)
+# Your Namecheap username
+NAMECHEAP_API_USER=your_namecheap_username
+# Your Namecheap API key (found in your Namecheap account settings)
+NAMECHEAP_API_KEY=your_namecheap_api_key
+
+## CrowdSec
+# Generate with: docker exec -it crowdsec cscli bouncers add traefik-bouncer
+# Use a long random string (64+ characters recommended)
+CROWDSEC_BOUNCER_KEY=your_long_random_bouncer_key_here
+
+## Umami (PostgreSQL)
+# Database user for Umami analytics
+UMAMI_DB_USER=umami
+# Strong password for Umami database
+UMAMI_DB_PASS=your_strong_database_password
+# Database name for Umami
+UMAMI_DB_NAME=umami
+# Random 64-character secret for Umami app security
+UMAMI_APP_SECRET=your_64_character_random_secret_here
+
+## Grafana
+# Admin username for Grafana dashboard
+GRAFANA_ADMIN_USER=admin
+# Strong password for Grafana admin user
+GRAFANA_ADMIN_PASS=your_strong_grafana_password