docs(install): add CoreHost setup screenshots

docs/install/corehost.md

@@ -15,27 +15,59 @@ description: Run a managed RomM instance on CoreHost
 
 ## Plans
 
-Instances are billed hourly from a prepaid balance, and new accounts start with free credit. Standard (1 vCPU, 2 GB RAM, 10 GB NVMe) is the smallest plan that fits RomM, and Power and Scale add more CPU, memory, and storage. Your games count against the plan's storage, so a large collection needs a bigger plan or extra 25 GB storage blocks, which you can add to any plan. See the [app page](https://corehost.io/p/romm) for current prices and regions.
+Standard (1 vCPU, 2 GB RAM, 10 GB NVMe) is the smallest plan that fits RomM, and Power and Scale add more CPU, memory, and storage. Your games count against the plan's storage, so a large collection needs a bigger plan or extra 25 GB storage blocks, which you can add to any plan.
 
 ## Install
 
-Open the [RomM app on CoreHost](https://corehost.io/p/romm) and choose a plan and region. The new instance gets a generated password for the `admin` user, which the CoreHost panel shows on the app page. If you lose it, reset it under **Admin password** in the app settings and restart the app.
+Open the [RomM app on CoreHost](https://corehost.io/p/romm). The name you give the app becomes its address, `https://<name>.hostedat.corehost.io`.
 
-Set up metadata provider credentials before your first scan, because they decide how well games get matched (see [Metadata Providers](../getting-started/metadata-providers.md)). Hasheous and LaunchBox need no account, while the others take an API key.
+![Naming the RomM app, which sets its web address](../resources/corehost/deploy-name.png)
+
+Then pick Standard (or a larger plan) and a region, which is also where the instance's backups stay.
+
+![Choosing a plan for RomM](../resources/corehost/deploy-plan.png)
+
+![Choosing a region for the instance](../resources/corehost/deploy-region.png)
+
+![Reviewing the app, plan, and region before deploying](../resources/corehost/deploy-review.png)
+
+## First sign-in
+
+RomM's setup wizard is turned off on CoreHost, because the `admin` user is created before the instance goes online. Its generated password is on the app page in the CoreHost panel. Sign in at the app address with those credentials, then set your own email and password from your profile. If you lose the password, reset it under **Admin password** in the app settings and restart the app.
+
+![The RomM app page in the CoreHost panel, with the admin credentials](../resources/corehost/app-overview.png)
+
+## Metadata providers
+
+Set up metadata provider credentials before your first scan, because they decide how well games get matched (see [Metadata Providers](../getting-started/metadata-providers.md)). Hasheous and LaunchBox need no account, while the others take an API key. On CoreHost the keys for IGDB, ScreenScraper, MobyGames, SteamGridDB, and RetroAchievements go in the app settings, and they take effect after a restart.
+
+![Metadata provider keys in the CoreHost app settings](../resources/corehost/settings-metadata.png)
 
 ## Adding ROMs
 
-Small batches can go through the [upload dialog](../using/uploads.md) in the browser. For a larger collection, copy files over SFTP into `romm/library/roms/<platform>` (and BIOS files into `romm/library/bios/<platform>`), using the SFTP credentials from the CoreHost panel.
+Small batches can go through the [upload dialog](../using/uploads.md) in the browser. For a larger collection, copy files over SFTP into `romm/library/roms/<platform>` (and BIOS files into `romm/library/bios/<platform>`). The SFTP host, username, and password are in the CoreHost panel, and the port is `2022`:
+
+```bash
+sftp -P 2022 <username>@<host>
+```
+
+Any SFTP client works, such as FileZilla, WinSCP, or Cyberduck. The login only reaches the app's files and doesn't give you an SSH shell.
+
+![SFTP credentials and the file browser in the CoreHost panel](../resources/corehost/files-sftp.png)
 
 Platform folder names must follow RomM's naming (see [Folder Structure](../getting-started/folder-structure.md)). After the upload finishes, run a scan (see [Your First Scan](../getting-started/first-scan.md)). If you add files over SFTP often, turn on the nightly library scan so new files get picked up without a manual run.
 
 ## Backups and updates
 
-CoreHost backs up every instance daily, and you can restore a backup in one click from the panel. It can also send encrypted backups to your own S3-compatible storage. Updates run on a copy of the instance first and roll back automatically if health checks fail. CoreHost deletes an instance's data 14 days after you cancel it, so copy your files off over SFTP first if you want to keep them.
+CoreHost backs up every instance daily, keeping the last 14 daily and 4 weekly backups, and any of them can be restored from the panel in one click. Updates run on a copy of the instance first and roll back automatically if health checks fail. CoreHost deletes an instance's data 14 days after you cancel it, so copy your files off over SFTP first if you want to keep them.
+
+![Backups and restore points in the CoreHost panel](../resources/corehost/backups.png)
 
 ## Custom domain
 
-Point a domain at the instance with a CNAME and a TXT verification record, and CoreHost issues the TLS certificate. If your domain uses CAA records, allow `letsencrypt.org`.
+The app address keeps working when you add your own domain, and each app takes one custom domain. Point it at the instance with a CNAME and a TXT verification record, and CoreHost issues the TLS certificate. If your domain uses CAA records, allow `letsencrypt.org`.
+
+![The included app address and the custom domain form](../resources/corehost/domain.png)
 
 ## Getting help