Release 0.19.6

# History

## 0.19.6

Install/update via the bootstrap script:

```shell
wget https://raw.githubusercontent.com/dokku/dokku/v0.19.6/bootstrap.sh
sudo DOKKU_TAG=v0.19.6 bash bootstrap.sh
```

### Other

- #3761: @pithyless Fix type-errors in dokku-installer.py
- #3759: @dependabot-preview[bot] chore(deps-dev): bump heroku/heroku-buildpack-php from 163 to 164 in /tests/apps/php
- #3758: @dependabot-preview[bot] chore(deps): bump jetty-servlet from 9.4.21.v20190926 to 9.4.22.v20191022 in /tests/apps/java

docs/getting-started/install/docker.md

@@ -3,7 +3,7 @@
 Pull the dokku/dokku image:
 
 ```shell
-docker pull dokku/dokku:0.19.5
+docker pull dokku/dokku:0.19.6
 ```
 
 Next, run the image.
@@ -17,7 +17,7 @@ docker run \
   --publish 8443:443 \
   --volume /var/lib/dokku:/mnt/dokku \
   --volume /var/run/docker.sock:/var/run/docker.sock \
-  dokku/dokku:0.19.5
+  dokku/dokku:0.19.6
 ```
 
 Dokku is run with the following options: