Creates a security group, a subnet group using the input list of subnets, a parameter group to enable logical replication, and a PostgreSQL instance.
module "vpc" {
source = "./modules/vpc"
...
}
module "rds" {
source = "./modules/rds"
vpc_id = module.vpc.id
private_subnet_ids = module.vpc.private_subnet_ids
db_name = "app_db"
db_username = "postgres"
db_password = var.db_password
}