fix dockerfile

Dockerfile

@@ -17,6 +17,8 @@ RUN DATABASE_URL=postgres://x/x \
     SECRET_KEY=x \
     ALLOWED_HOSTS=x \
     CHOBOTNICE_RV_GID=x \
+    INSTAGRAM_CLIENT_ID=x \
+    INSTAGRAM_CLIENT_SECRET=x \
     python manage.py collectstatic --noinput --settings=rybicka.settings.production
 
 RUN bash -c "adduser --disabled-login --quiet --gecos app app &&  \