Add note on BUILDING_DOCKER

1 files changed, 4 insertions, 0 deletions

diff --git a/Dockerfile b/Dockerfile
index 46f45bf3..7d1dab74 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -26,6 +26,10 @@ COPY . .
 
 # Set dummy variables so collectstatic can load settings.py
 RUN \
+    # Set BUILDING_DOCKER to anything but undefined so settings.py
+    # does not insert django_prometheus into the list of installed apps.
+    # This prevents django_prometheus from attempting to connect to the database
+    # when the collectstatic task is ran.
     BUILDING_DOCKER=yes \
     SECRET_KEY=dummy_value \
     DATABASE_URL=postgres://localhost \