feat: add environment configuration template (.env.example)

.env.example

@@ -0,0 +1,74 @@
+# Umami Environment Configuration Template
+# Copy this file to .env and update with your actual values
+
+# ============================================
+# REQUIRED CONFIGURATION
+# ============================================
+
+# Database Configuration (Required)
+# PostgreSQL connection string (minimum version 12.14)
+# Format: postgresql://username:password@host:port/database
+# Example: postgresql://umami:mypassword@localhost:5432/umami
+DATABASE_URL=postgresql://username:password@localhost:5432/umami
+
+# ============================================
+# OPTIONAL CONFIGURATION
+# ============================================
+
+# Base Path
+# If you want to host Umami under a subdirectory (e.g., /analytics)
+# Leave empty for root path deployment
+# BASE_PATH=/analytics
+
+# Tracker Script Customization
+# Comma-separated list of alternative names for the tracking script
+# Useful for avoiding ad blockers
+# TRACKER_SCRIPT_NAME=custom-script.js,analytics.js
+
+# Tracker Script URL
+# External URL for the tracker script if hosted separately
+# TRACKER_SCRIPT_URL=https://example.com/script.js
+
+# Collection API Endpoint
+# Custom endpoint for collecting analytics data
+# COLLECT_API_ENDPOINT=/api/collect
+
+# CORS Configuration
+# Maximum age for CORS preflight requests (in seconds)
+# CORS_MAX_AGE=86400
+
+# Localization
+# Default locale for the application
+# DEFAULT_LOCALE=en-US
+
+# Security
+# Force SSL/HTTPS connections
+# FORCE_SSL=1
+
+# Frame Ancestors
+# Allowed URLs that can embed Umami in an iframe (space-separated)
+# ALLOWED_FRAME_URLS=https://example.com https://another.com
+
+# Cloud Mode (Umami Cloud only)
+# Enable cloud mode features
+# CLOUD_MODE=1
+# CLOUD_URL=https://cloud.umami.is
+# CLICKHOUSE_URL=https://clickhouse.example.com
+# REDIS_URL=redis://localhost:6379
+
+# Database Type Override
+# Skip database checks if using alternative database setup
+# DATABASE_TYPE=custom
+
+# Skip Checks (Development only)
+# Skip database checks during development
+# SKIP_DB_CHECK=1
+# SKIP_DB_MIGRATION=1
+
+# ============================================
+# NOTES
+# ============================================
+# 1. Never commit the .env file to version control
+# 2. After first build, change the default admin password (admin/umami)
+# 3. Ensure PostgreSQL is running before starting the application
+# 4. For production, always use strong passwords and enable FORCE_SSL