Reengineered app. Added region selection.

app/templates/arm_vm.jsonc

@@ -0,0 +1,17 @@
+{
+    // This is a partial Azure virtual machine resource template.
+    "type": "Microsoft.Compute/virtualMachines",
+    "apiVersion": "2022-03-01",
+    "name": "example-vm",
+    "location": "westeurope",
+    "properties": {
+        "storageProfile": {
+            "imageReference": {
+                "publisher": "{{ publisher }}",
+                "offer": "{{ offer }}",
+                "sku": "{{ sku }}",
+                "version": "{{ version }}"
+            }
+        }
+    }
+}

app/templates/azurerm_hcl.tpl

@@ -0,0 +1,6 @@
+source_image_reference = {
+    publisher = "{{ publisher }}"
+    offer     = "{{ offer }}"
+    sku       = "{{ sku }}"
+    version   = "{{ version }}"
+}

app/templates/shell.tpl

@@ -0,0 +1 @@
+az create -n MyVM -g MyResourceGroup --image {{ publisher }}:{{ offer }}:{{ sku }}:{{ version }}