doc: update README.md

- Fix a broken link (fixes #6780)
- Set direct links
- Add a link to the Docker installation guide

README.md

@@ -10,9 +10,11 @@ Jitsi Meet allows very efficient collaboration. Users can stream their desktop o
 
 On the client side, no installation is necessary. You just point your browser to the URL of your deployment. This section is about installing a Jitsi Meet suite on your server and hosting your own conferencing service.
 
-Installing Jitsi Meet is a simple experience. For Debian-based system, following the [quick-install](https://github.com/jitsi/jitsi-meet/blob/master/doc/quick-install.md) document, which uses the package system. You can also see a demonstration of the process in [this tutorial video](https://jitsi.org/tutorial).
+Installing Jitsi Meet is a simple experience. For Debian-based system, following the [quick install](https://jitsi.github.io/handbook/docs/devops-guide/devops-guide-quickstart) document, which uses the package system. You can also see a demonstration of the process in [this tutorial video](https://jitsi.org/tutorial).
 
-For other systems, or if you wish to install all components manually, see the [detailed manual installation instructions](https://github.com/jitsi/jitsi-meet/blob/master/doc/manual-install.md).
+For other systems, or if you wish to install all components manually, see the [detailed manual installation instructions](https://jitsi.github.io/handbook/docs/devops-guide/devops-guide-manual).
+
+Installation with Docker is also available. Please see the [instruction](https://jitsi.github.io/handbook/docs/devops-guide/devops-guide-docker).
 
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