Merge branch 'fix-entrypoint-db' into 'master'

Wait for correct db in entrypoint

See merge request !693

resources/entrypoint_production.sh

@@ -5,7 +5,7 @@ set -e
 >&2 echo "Creating Sphinx documentation"
 sphinx-build -b html /usr/src/app/docs/ /concrexit/docs/
 
-until psql -h "$DJANGO_POSTGRES_HOST" -U "postgres" -c '\l'; do
+until psql -h "$DJANGO_POSTGRES_HOST" -U "postgres" -c '\l' $POSTGRES_DB; do
     >&2 echo "PostgreSQL is unavailable: Sleeping"
     sleep 5
 done