Add example environment configuration file

.env.example

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+# Django Configuration
+# Set to False in production
+DEBUG=True
+
+# Django Secret Key
+# Generate a new secret key for production: python -c 'from django.core.management.utils import get_random_secret_key; print(get_random_secret_key())'
+DJANGO_SECRET_KEY=your-secret-key-here
+
+# Email Configuration
+# SMTP Host (examples below)
+EMAIL_HOST=smtp.gmail.com
+
+# SMTP Port (common ports: 587 for TLS, 465 for SSL, 25 for unencrypted)
+EMAIL_PORT=587
+
+# Email credentials
+EMAIL_HOST_USER=your-email@gmail.com
+EMAIL_HOST_PASSWORD=your-app-password-here
+
+# Connection security
+# Use TLS (True for most providers like Gmail, Outlook)
+EMAIL_USE_TLS=True
+# Use SSL (False for most providers, True for some older configurations)
+EMAIL_USE_SSL=False
+
+# Connection timeout in seconds
+EMAIL_TIMEOUT=10
+
+# Redis Configuration
+REDIS_URL_CACHE=unix:///var/run/redis/redis.sock?db=2
+REDIS_URL_CELERY=unix:///var/run/redis/redis.sock?db=3