feat: add Elastic IP for permanent domain pointing

infra/terraform/ec2.tf

@@ -142,3 +142,19 @@ resource "aws_instance" "app" {
     ignore_changes = [ami, user_data]
   }
 }
+
+# --------------------------------------------------
+# Elastic IP - permanent public IP for the EC2 instance.
+# This IP never changes even after instance restarts,
+# making it safe to point a domain name at it.
+# --------------------------------------------------
+resource "aws_eip" "app" {
+  domain   = "vpc"
+  instance = aws_instance.app.id
+
+  tags = {
+    Name        = "${var.project_name}-eip"
+    Project     = var.project_name
+    Environment = var.environment
+  }
+}

infra/terraform/outputs.tf

@@ -14,7 +14,7 @@ output "private_subnet_id" {
 }
 
 output "ec2_instance_id" {
-  description = "EC2 instance ID — use this to connect via SSM"
+  description = "EC2 instance ID - use this to connect via SSM"
   value       = aws_instance.app.id
 }
 
@@ -27,3 +27,13 @@ output "ec2_public_dns" {
   description = "Public DNS of the EC2 instance"
   value       = aws_instance.app.public_dns
 }
+
+output "elastic_ip" {
+  description = "Permanent Elastic IP - point your domain DNS A record to this"
+  value       = aws_eip.app.public_ip
+}
+
+output "rds_hostname" {
+  description = "RDS instance hostname"
+  value       = aws_db_instance.tasks.address
+}