Add environment configuration template and update .gitignore for new env files

.env.example

@@ -0,0 +1,44 @@
+# Environment Configuration Template
+# Copy this file to .env.dev, .env.test, or .env.uat and fill in the values
+
+# Database
+DATABASE_URL=
+DB_USERNAME=
+DB_PASSWORD=
+DB_DATABASE_NAME=
+DB_HOSTNAME=
+DB_PORT=5432
+
+# Email Bypass (set to true for dev/test, false for production-like environments)
+BY_PASS_EMAIL=
+BYPASS_OTP=
+
+# Brevo Email Configuration
+BREVO_EMAIL_API_KEY=
+BREVO_API_BASEURL=https://api.brevo.com
+BREVO_FROM_EMAIL=
+BREVO_SMTP_HOST=smtp-relay.brevo.com
+BREVO_SMTP_PORT=587
+BREVO_SMTP_USER=
+BREVO_SMTP_PASS=
+
+# JWT Configuration
+REFRESH_TOKEN_SECRET=
+JWT_SECRET=
+JWT_ACCESS_EXPIRATION_MINUTES=30
+JWT_REFRESH_EXPIRATION_DAYS=7
+JWT_RESET_PASSWORD_EXPIRATION_MINUTES=15
+JWT_VERIFY_EMAIL_EXPIRATION_MINUTES=15
+
+# Security
+SALT_ROUNDS=
+NODE_ENV=
+
+# AWS S3
+S3_BUCKET_NAME=
+
+# Admin Configuration
+MINGLAR_ADMIN_NAME=
+MINGLAR_ADMIN_EMAIL=
+AM_INVITATION_LINK=
+HOST_LINK=