Add backend environment configuration template

backend/.env.example

@@ -0,0 +1,30 @@
+# Application Settings
+APP_NAME=Family Hub
+APP_VERSION=0.1.0
+DEBUG=True
+
+# Database
+DATABASE_URL=sqlite:///./family_hub.db
+# For PostgreSQL (production):
+# DATABASE_URL=postgresql://user:password@localhost:5432/family_hub
+
+# Security
+SECRET_KEY=your-super-secret-key-change-this-in-production
+ALGORITHM=HS256
+ACCESS_TOKEN_EXPIRE_MINUTES=30
+
+# CORS
+ALLOWED_ORIGINS=http://localhost:5173,http://localhost:3000
+
+# Google Calendar API (Optional - configure when needed)
+GOOGLE_CLIENT_ID=
+GOOGLE_CLIENT_SECRET=
+GOOGLE_REDIRECT_URI=
+
+# Mealie Integration (Optional - configure when needed)
+MEALIE_API_URL=
+MEALIE_API_TOKEN=
+
+# Home Assistant Integration (Optional - configure when needed)
+HOME_ASSISTANT_URL=
+HOME_ASSISTANT_TOKEN=