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/erpnext-install.sh

@@ -60,7 +60,8 @@ msg_ok "Installed Frappe Bench"
 msg_info "Initializing Frappe Bench"
 ADMIN_PASS=$(openssl rand -base64 18 | tr -dc 'a-zA-Z0-9' | head -c13)
 cd /opt
-export BENCH_ALLOW_SUPERUSER=1
+export CI=1
+export FRAPPE_ALLOW_SUPERUSER=1
 $STD bench init --frappe-branch version-15 frappe-bench
 cd /opt/frappe-bench
 $STD bench get-app erpnext --branch version-15