fix: tubearchivist port conflict, jitsi flat repo, erpnext root env

- tubearchivist: backend on 8100 behind nginx on 8000 (was both 8000)
- jitsi: URI=download.jitsi.org suite=stable/ component=empty for flat repo
- erpnext: use CI=1 and FRAPPE_ALLOW_SUPERUSER=1 (not BENCH_ALLOW_SUPERUSER)

install/tubearchivist-install.sh

@@ -85,8 +85,7 @@ cat <<EOF >/opt/tubearchivist/.env
 TA_HOST=http://${LOCAL_IP}:8000
 TA_USERNAME=admin
 TA_PASSWORD=${TA_PASSWORD}
-TA_PORT=8000
-TA_BACKEND_PORT=8100
+TA_PORT=8100
 ELASTIC_PASSWORD=${ES_PASSWORD}
 REDIS_CON=redis://localhost:6379
 ES_URL=http://localhost:9200