Provide options for legacy add-ons (#814)

* Provide options for legacy add-ons

* Remove whitespace from blank line

* Only provide primitive data types as Docker environment variable

* Fix linting issues

* Update addon.py

hassio/docker/addon.py

@@ -81,12 +81,14 @@ class DockerAddon(DockerInterface):
         """Return environment for Docker add-on."""
         addon_env = self.addon.environment or {}
 
-        # Need audio settings
-        if self.addon.with_audio:
-            addon_env.update({
-                'ALSA_OUTPUT': self.addon.audio_output,
-                'ALSA_INPUT': self.addon.audio_input,
-            })
+        # Provide options for legacy add-ons
+        if self.addon.legacy:
+            for key, value in self.addon.options.items():
+                if isinstance(value, (int, str)):
+                    addon_env[key] = value
+                else:
+                    _LOGGER.warning(
+                        "Can not set nested option %s as Docker env", key)
 
         return {
             **addon_env,