Release 0.23.8

# History

## 0.23.8

Install/update via the bootstrap script:

```shell
wget https://raw.githubusercontent.com/dokku/dokku/v0.23.8/bootstrap.sh
sudo DOKKU_TAG=v0.23.8 bash bootstrap.sh
```

### Bug Fixes

- #4437: @josegonzalez Switch to using GIT_DIR environment variable to fix Centos 7 support
- #4436: @josegonzalez Properly handle directory change when cleaning .git directory

### New Features

- #4428: @josegonzalez Bump azure ARM quickstart template on release

### Documentation

- #4435: @josegonzalez Change page title based on current page
- #4427: @josegonzalez Change process management doc references to make more sense

### Other

- #4438: @josegonzalez Split out nginx tests further to decrease overall CI runtime
- #4430: @dependabot-preview[bot] chore(deps): bump jetty-servlet from 11.0.0 to 11.0.1 in /tests/apps/java

docs/assets/style.css

@@ -39,13 +39,13 @@ h1 {
   font-size: 1.6em;
 }
 .header .navbar-brand a {
-  background-image: url(https://cdn.jsdelivr.net/gh/dokku/dokku@v0.23.7/docs/assets/dokku.png);
+  background-image: url(https://cdn.jsdelivr.net/gh/dokku/dokku@v0.23.8/docs/assets/dokku.png);
   text-indent: 40px;
 }
 .blurb {
   color: #424242;
   background-color: #ededed;
-  background-image: url(https://cdn.jsdelivr.net/gh/dokku/dokku@v0.23.7/docs/assets/gplaypattern.png);
+  background-image: url(https://cdn.jsdelivr.net/gh/dokku/dokku@v0.23.8/docs/assets/gplaypattern.png);
   padding: 45px 0;
   text-align: center;
 }