diff --git a/docs/dev/install.rst b/docs/dev/install.rst
index aa3941c0f3d..5f6ec948ded 100644
--- a/docs/dev/install.rst
+++ b/docs/dev/install.rst
@@ -114,7 +114,10 @@ save some work while typing docker compose commands. This section explains these
     * ``--init`` is used the first time this command is ran to run initial migrations, create an admin user, etc
     * ``--no-reload`` makes all celery processes and django runserver
       to use no reload and do not watch for files changes
-    * ``--ngrok`` is useful when it's required to access the local instance from outside (e.g. GitHub webhook)
+    * ``--no-django-debug`` runs all containers with ``DEBUG=False``
+    * ``--http-domain`` configures an external domain for the environment (useful for Ngrok or other http proxy).
+      Note that https proxies aren't supported.
+      There will also be issues with "suspicious domain" failures on Proxito.
     * ``--ext-theme`` to use the new dashboard templates
     * ``--webpack`` to start the Webpack dev server for the new dashboard templates
 
diff --git a/readthedocs/settings/docker_compose.py b/readthedocs/settings/docker_compose.py
index 84afdea85bc..46a8885eb29 100644
--- a/readthedocs/settings/docker_compose.py
+++ b/readthedocs/settings/docker_compose.py
@@ -8,6 +8,8 @@ class DockerBaseSettings(CommunityBaseSettings):
 
     """Settings for local development with Docker"""
 
+    DEBUG = bool(os.environ.get('RTD_DJANGO_DEBUG', True))
+
     DOCKER_ENABLE = True
     RTD_DOCKER_COMPOSE = True
     RTD_DOCKER_COMPOSE_VOLUME = 'community_build-user-builds'
@@ -149,6 +151,7 @@ def DATABASES(self):  # noqa
         }
 
     ACCOUNT_EMAIL_VERIFICATION = "none"
+
     SESSION_COOKIE_DOMAIN = None
     CACHES = {
         'default': {
diff --git a/readthedocs/storage/mixins.py b/readthedocs/storage/mixins.py
index 7e0b5794301..5820d3d92fd 100644
--- a/readthedocs/storage/mixins.py
+++ b/readthedocs/storage/mixins.py
@@ -13,7 +13,9 @@ class OverrideHostnameMixin:
     See: https://github.com/jschneier/django-storages/pull/658
     """
 
-    override_hostname = None    # Just the hostname without scheme (eg. 'assets.readthedocs.org')
+    override_hostname = (
+        None  # Just the hostname without scheme (eg. 'assets.readthedocs.org')
+    )
 
     def url(self, *args, **kwargs):
         url = super().url(*args, **kwargs)
diff --git a/readthedocs/storage/s3_storage.py b/readthedocs/storage/s3_storage.py
index 48d40245720..a1d51a9aba7 100644
--- a/readthedocs/storage/s3_storage.py
+++ b/readthedocs/storage/s3_storage.py
@@ -77,8 +77,8 @@ def __init__(self, *args, **kwargs):
 
 class S3StaticStorageMixin:
 
-    bucket_name = getattr(settings, 'S3_STATIC_STORAGE_BUCKET', None)
-    override_hostname = getattr(settings, 'S3_STATIC_STORAGE_OVERRIDE_HOSTNAME', None)
+    bucket_name = getattr(settings, "S3_STATIC_STORAGE_BUCKET", None)
+    override_hostname = getattr(settings, "S3_STATIC_STORAGE_OVERRIDE_HOSTNAME", None)
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)