Docs: Unify code block languages

Use `yaml` for Dockerfiles, `shell` for environment variables and `json` for our config file.

Signed-off-by: David Mehren <git@herrmehren.de>
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David Mehren 2021-01-11 12:00:33 +01:00
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@ -15,7 +15,7 @@
6. In the `docker-compose.yml` add the following environment variables to `app:` `environment:`
```Dockerfile
```yaml
- CMD_DOMAIN=your.hedgedoc.domain
- CMD_URL_ADDPORT=true
- CMD_PROTOCOL_USESSL=true