Release 0.16.3

# History

## 0.16.3

Install/update via the bootstrap script:

```shell
wget https://raw.githubusercontent.com/dokku/dokku/v0.16.3/bootstrap.sh
sudo DOKKU_TAG=v0.16.3 bash bootstrap.sh
```

### Bug Fixes

- #3541: @josegonzalez Handle case where image is null on first deploy

### New Features

- #3543: @josegonzalez Add ability to clear global domains
- #3517: @josegonzalez SSH key updates
- #3538: @josegonzalez Silence dokku run 'errors'

### Documentation

- #3523: @MarcDiethelm Add an example how to specify a Dockerfile for deployment
- #3539: @josegonzalez Warn users when ufw is enabled

docs/assets/versions.json

@@ -13,6 +13,6 @@
     "0.13.4",
     "0.14.6",
     "0.15.5",
-    "0.16.2"
+    "0.16.3"
   ]
 }