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/modules/app_engine/variables.tf

@@ -0,0 +1,71 @@
+variable "app_name" {
+  description = "Name of the application"
+  type        = string
+}
+
+variable "gcp_project_id" {
+  description = "GCP Project ID"
+  type        = string
+}
+
+variable "gcp_region" {
+  description = "GCP region"
+  type        = string
+}
+
+variable "app_source_zip_path" {
+  description = "Path to the app source code zip file"
+  type        = string
+}
+
+variable "firebase_project_id" {
+  description = "Firebase project ID"
+  type        = string
+}
+
+variable "flask_secret_key" {
+  description = "Flask secret key"
+  type        = string
+  sensitive   = true
+}
+
+variable "service_account_email" {
+  description = "Service account email for the App Engine service"
+  type        = string
+}
+
+variable "service_account_key_data" {
+  description = "Service account key JSON data"
+  type        = string
+  sensitive   = true
+}
+
+variable "filevine_client_id" {
+  description = "Filevine client ID"
+  type        = string
+  sensitive   = true
+}
+
+variable "filevine_client_secret" {
+  description = "Filevine client secret"
+  type        = string
+  sensitive   = true
+}
+
+variable "filevine_pat" {
+  description = "Filevine personal access token"
+  type        = string
+  sensitive   = true
+}
+
+variable "filevine_org_id" {
+  description = "Filevine organization ID"
+  type        = string
+  sensitive   = true
+}
+
+variable "filevine_user_id" {
+  description = "Filevine user ID"
+  type        = string
+  sensitive   = true
+}