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/getting-started/installation.md

@@ -21,8 +21,8 @@ To install the latest stable version of Dokku, you can run the following shell c
 
 ```shell
 # for debian systems, installs Dokku via apt-get
-wget https://raw.githubusercontent.com/dokku/dokku/v0.16.2/bootstrap.sh;
-sudo DOKKU_TAG=v0.16.2 bash bootstrap.sh
+wget https://raw.githubusercontent.com/dokku/dokku/v0.16.3/bootstrap.sh;
+sudo DOKKU_TAG=v0.16.3 bash bootstrap.sh
 ```
 
 The installation process takes about 5-10 minutes, depending upon internet connection speed.