Add example environment variable file

.env.example

@@ -0,0 +1,17 @@
+# Example environment variable file
+# Copy this to .env or manually set the environment variables
+
+# Redis URL -- Used for storing session data
+REDIS_URL=redis://localhost:6379
+
+# PostgreSQL URL -- Used for storing data
+# Option 1: Specify the URL directly
+DATABASE_URL=postgresql://libretunes:password@localhost:5432/libretunes
+
+# Option 2: Specify the individual components
+# Must specify at least POSTGRES_HOST
+# POSTGRES_USER=libretunes
+# POSTGRES_PASSWORD=password
+# POSTGRES_HOST=localhost
+# POSTGRES_PORT=5432
+# POSTGRES_DB=libretunes