Commit iniziale di eminuxCRM: CRM Rails con pipeline, campagne email e Docker.

Include autenticazione, progetti isolati, mail marketing HTML con SMTP, test A/B e editor WYSIWYG.

Co-authored-by: Cursor <cursoragent@cursor.com>

.env.example

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+# Database
+POSTGRES_USER=simplecrm
+POSTGRES_PASSWORD=change_me_in_production
+POSTGRES_DB=simplecrm_development
+DATABASE_HOST=postgres
+DATABASE_PORT=5432
+
+# Rails
+RAILS_ENV=development
+RAILS_MASTER_KEY=
+SECRET_KEY_BASE=generate_with_bin_rails_secret
+APP_HOST=localhost
+APP_PORT=3001
+# Produzione dietro reverse proxy (es. crm.eminux.it). Separare con virgola.
+# RAILS_ALLOWED_HOSTS=crm.eminux.it,192.168.1.158,localhost
+# FORCE_SSL=false       # true solo se Rails termina HTTPS (dietro NPM lasciare false)
+# ASSUME_SSL=true       # true se TLS termina su NPM/Caddy (URL https corretti)
+# SESSION_COOKIE_SECURE=false  # true solo con HTTPS end-to-end verso Rails
+
+# Mailer (password reset in development uses letter_opener-like logging)
+MAILER_FROM=noreply@simplecrm.local
+SMTP_ADDRESS=
+SMTP_PORT=587
+SMTP_USERNAME=
+SMTP_PASSWORD=
+SMTP_DOMAIN=
+
+# Timezone
+TZ=Europe/Rome