feat: add sample setting files

Author: wphyojpl

tf-module/stac_browser/terraform.tf.example

@@ -0,0 +1,8 @@
+terraform {
+  backend "s3" {
+    region         = "us-west-2"
+    bucket         = "am-uds-dev-cumulus-tf-state"
+    key            = "am-uds-dev-cumulus/stac_browser/unity/terraform.tfstate"
+    dynamodb_table = "am-uds-dev-cumulus-tf-locks"
+  }
+}

tf-module/stac_browser/terraform.tfvars.example

@@ -0,0 +1,5 @@
+prefix = "uds-sbx"
+ami_id = "ami-xxx"
+cumulus_lambda_vpc_id = "vpc-xxx"
+image_tag="9.6.0"
+subnet_ids = ["subnet-private-subnet-id-1", "subnet-private-subnet-id-2"]