Add comprehensive Terraform infrastructure with Firebase automation

- Create Firebase project, web app, and Firestore database
- Automate Firebase Authentication with email templates
- Configure security rules for user data isolation
- Support Cloud Run and App Engine hosting options
- Add professional email templates for password reset and verification
- Include deployment scripts and comprehensive documentation
- Implement service accounts with minimal required permissions
- Add Docker configuration for containerized deployment

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

terraform/app.yaml

@@ -0,0 +1,29 @@
+# App Engine configuration file
+runtime: python311
+
+instance_class: F1
+automatic_scaling:
+  min_idle_instances: automatic
+  max_idle_instances: 1
+  min_pending_latency: automatic
+  max_pending_latency: automatic
+
+# Environment variables
+env_variables:
+  FLASK_ENV: production
+  PORT: 8080
+
+# Handlers
+handlers:
+- url: /.*
+  script: auto
+  secure: always
+
+# Health check
+health_check:
+  enable_health_check: true
+  check_path: "/"
+
+# Runtime configuration
+runtime_config:
+  python_version: 3