[ci] workaround tzdata install

.drone.yml

@@ -10,7 +10,8 @@ steps:
     image: ubuntu
     pull: if-not-exists
     commands:
-      - apt -qq update && apt -yqq install redis-server postgresql --no-install-recommends
+      - ln -fs /usr/share/zoneinfo/America/Chicago /etc/localtime
+      - DEBIAN_FRONTEND=noninteractive apt -qq update && apt -yqq install redis-server postgresql --no-install-recommends
       - psql -U postgres -c "CREATE USER klip WITH PASSWORD 'klip' SUPERUSER;"
 
   - name: "configure .env"