fix: delete tmp file befor creating it

setup

@@ -59,6 +59,7 @@ echo "Wait a few seconds for the container to spin up ..."
 sleep 5
 
 if [ $POSTGRES_SHARED_HOSTING == "y" ]; then
+    rm -f tmp
     touch tmp
     echo "REVOKE ALL ON DATABASE template1 FROM public;" >> tmp
     echo "REVOKE ALL ON SCHEMA public FROM public;" >> tmp