fix: cert email template variable, choose a default source type

Author: agneum

instance.tf

@@ -32,7 +32,7 @@ data "template_file" "init" {
     dle_version_full = "${var.dle_version_full}"
     aws_deploy_dns_zone_name = "${var.aws_deploy_dns_zone_name}"
     aws_deploy_dns_api_subdomain = "${var.aws_deploy_dns_api_subdomain}"
-    aws_deploy_certificate_email = "{var.aws_deploy_certificate_email}"
+    aws_deploy_certificate_email = "${var.aws_deploy_certificate_email}"
     source_postgres_dbname = "${var.source_postgres_dbname}"
     source_postgres_host = "${var.source_postgres_host}"
     source_postgres_port = "${var.source_postgres_port}"

variables.tf

@@ -150,7 +150,7 @@ variable "postgres_config_shared_preload_libraries" {
 
 variable "source_type" {
   description = "Type of data source used for DLE. For now it can be postgres,S3"
-  default = ""
+  default = "postgres"
 }
 
 variable "source_pgdump_s3_bucket" {