fix: docker-compose startup, general settings

.env.example

@@ -1,9 +1,26 @@
 # Meal Planner - Elderly Care Home Meal Ordering System
-# SQLite database is stored locally at ./meal-planner.db
-# No DATABASE_URL needed for SQLite file-based storage
 
+# Database Configuration
+# For local development: leave DATABASE_URI empty to use SQLite (./meal-planner.db)
+# For Docker: set to PostgreSQL connection string
+# DATABASE_URI=postgres://postgres:postgres@localhost:5433/payload-example-multi-tenant
+
+# Payload CMS Configuration
 PAYLOAD_SECRET=your-secret-key-change-in-production
 PAYLOAD_PUBLIC_SERVER_URL=http://localhost:3000
 
 # Set to true to seed the database with sample data on first run
-SEED_DB=true
+SEED_DB=true
+
+# MinIO/S3 Storage Configuration (Docker only)
+# For local development: leave empty to use local file storage
+# For Docker: configure MinIO endpoint and credentials
+# MINIO_ENDPOINT=http://localhost:9100
+# S3_BUCKET=meal-planner
+# S3_REGION=us-east-1
+# S3_ACCESS_KEY_ID=minioadmin
+# S3_SECRET_ACCESS_KEY=minioadmin
+
+# OpenAI API Key for computer vision form analysis
+# Get your API key from https://platform.openai.com/api-keys
+OPENAI_API_KEY=your-openai-api-key