# Environmental variables

- [ ] When starting the mastercontainer with `-e APACHE_PORT=11000` on a clean instance, the domaincheck container should be started with that same port published. That makes sure that also the Apache container will use that port later on. Using a value here that is not a port will not allow the mastercontainer to start correctly.
- [ ] Make also sure that reverse proxies work by following https://github.com/nextcloud/all-in-one/blob/main/reverse-proxy.md#reverse-proxy-documentation and following [001-initial-setup.md](./001-initial-setup.md) and [002-new-instance.md](./002-new-instance.md)
- [ ] When starting the mastercontainer with `-e NEXTCLOUD_DATADIR="/mnt/testdata"` it should map that location from `/mnt/testdata` to `/mnt/ncdata` inside the Nextcloud container. Not having adjusted the permissions correctly before starting the Nextcloud container the first time will not allow the Nextcloud container to start correctly. See https://github.com/nextcloud/all-in-one#how-to-change-the-default-location-of-nextclouds-datadir for allowed values.
- [ ] When starting the mastercontainer with `-e NEXTCLOUD_MOUNT="/mnt/"` it should map `/mnt/` to `/mnt/` inside the Nextcloud container. See https://github.com/nextcloud/all-in-one#how-to-allow-the-nextcloud-container-to-access-directories-on-the-host for allowed values.