proxies: add smart proxy support

still to do:

* document new configuration options
* add smart proxies to groups view
* import bandwidth and CPU alarms

app/terraform/terraform.py

@@ -3,8 +3,6 @@ import subprocess  # nosec
 from abc import abstractmethod
 from typing import Any, Optional, Tuple
 
-import jinja2
-
 from app.terraform import BaseAutomation
 
 
@@ -151,6 +149,4 @@ class TerraformAutomation(BaseAutomation):
         return json.loads(terraform.stdout)
 
     def tf_write(self, template: str, **kwargs: Any) -> None:
-        tmpl = jinja2.Template(template)
-        with open(self.working_directory("main.tf"), 'w') as tf:
-            tf.write(tmpl.render(**kwargs))
+        self.tmpl_write("main.tf", template, **kwargs)