change machine type

atlantis.yaml

@@ -1,30 +1,8 @@
 version: 3
-automerge: false
-delete_source_branch_on_merge: false
-parallel_plan: true
-parallel_apply: true
-
 projects:
-- name: terraform-gcp-vm-instance
-  dir: .
-  workspace: default
-  terraform_version: v1.0.0
-  delete_source_branch_on_merge: false
-  autoplan:
-    when_modified: ["*.tf", "*.tfvars"]
-    enabled: true
-  apply_requirements: ["approved", "mergeable"]
-  workflow: custom
-
-workflows:
-  custom:
-    plan:
-      steps:
-      - init:
-          extra_args: ["-input=false"]
-      - plan:
-          extra_args: ["-input=false", "-lock=false"]
-    apply:
-      steps:
-      - apply:
-          extra_args: ["-input=false", "-auto-approve"]
+  - name: gcp-vm-instance
+    dir: .
+    workspace: default
+    autoplan:
+      when_modified: ["*.tf", "*.tfvars"]
+      enabled: true

variables.tf

@@ -19,7 +19,7 @@ variable "zone" {
 variable "machine_type" {
   description = "The machine type for VM instances"
   type        = string
-  default     = "e2-small"
+  default     = "e2-medium"
 }
 
 variable "ssh_username" {