feat: add container setup

- build container with multi-stage Dockerfile
- change api listen port to 9001

docs/admin-manual/setup/install.md

@@ -19,19 +19,15 @@ If you are coming from **Airtime**, please follow the [Airtime migration guide](
 You can install LibreTime using the one of the following methods:
 
 - [:rocket: Using the installer](#using-the-installer)
-- :construction: Using Ansible
+- [:rocket: Using docker-compose](#using-docker-compose)
+- :construction: Using ansible
 
-#### Minimum system requirements
+### Minimum system requirements
 
 - 1 Ghz Processor
 - 2 GB RAM recommended (1 GB required)
 - A static external IP address ([How to setup a static ip using Netplan](../tutorials/setup-a-static-ip-using-netplan.md))
 
-One of the [supported distribution releases](../../developer-manual/development/releases.md#distributions-releases-support):
-
-- [Debian 11](https://www.debian.org/releases/)
-- [Ubuntu 20.04 LTS](https://wiki.ubuntu.com/Releases)
-
 :::warning
 
 Make sure that you have configured a **firewall** and it's not blocking connection to the desired ports.
@@ -50,6 +46,11 @@ LibreTime requires the following default ports to be open:
 
 The installer is shipped in the released tarballs or directly in the project repository.
 
+We recommend installing on one of the following [distribution releases](../../developer-manual/development/releases.md#distributions-releases-support):
+
+- [Debian 11](https://www.debian.org/releases/)
+- [Ubuntu 20.04 LTS](https://wiki.ubuntu.com/Releases)
+
 ### Before installing
 
 Before installing LibreTime, you need to make sure you operating system is properly configured.
@@ -207,13 +208,83 @@ sudo systemctl start libretime.target
 sudo systemctl --all --plain | grep libretime
 ```
 
-#### Configure
+Next, continue by [configuring your installation](#configure).
+
+## Using docker-compose
+
+:::warning
+
+The docker-compose install is still a work in progress and is **EXPERIMENTAL**, breaking changes may occur without notice.
+
+:::
+
+### Download
+
+Pick the version you want to install:
+
+<CodeBlock language="bash">
+echo LIBRETIME_VERSION="{vars.version}" > .env
+</CodeBlock>
+
+Download the docker-compose files from the repository:
+
+```bash
+# Load LIBRETIME_VERSION variable
+source .env
+
+wget "https://raw.githubusercontent.com/libretime/libretime/$LIBRETIME_VERSION/docker-compose.yml"
+wget "https://raw.githubusercontent.com/libretime/libretime/$LIBRETIME_VERSION/docker/nginx.conf"
+wget "https://raw.githubusercontent.com/libretime/libretime/$LIBRETIME_VERSION/docker/config.yml"
+```
+
+### Setup
+
+Once the files are downloaded, edit the [configuration file](./configuration.md) at `./config.yml` to fill required information and to match your needs.
+
+:::info
+
+The `docker/config.yml` configuration file you previously downloaded already contains specific values required by the container setup, you should not change them:
+
+```yaml
+database:
+  host: "postgres"
+rabbitmq:
+  host: "rabbitmq"
+playout:
+  liquidsoap_host: "liquidsoap"
+liquidsoap:
+  server_listen_address: "0.0.0.0"
+stream:
+  outputs:
+    .default_icecast_output:
+      host: "icecast"
+```
+
+:::
+
+Next, run the following commands to setup the database:
+
+```bash
+docker-compose run --rm api libretime-api migrate
+```
+
+Finally, start the services, and check that they are running properly using the following commands:
+
+```bash
+docker-compose up -d
+
+docker-compose logs -f
+```
+
+Next, continue by [configuring your installation](#configure).
+
+## Configure
 
 Once the setup is completed, log in the interface and make sure to edit the project settings (go to **Settings** > **General**) to match your needs. Important settings are:
 
 - Timezone
 - First day of the week
 
-### Next
+## Next
 
 Once completed, it's recommended to [install a reverse proxy](./reverse-proxy.md) to setup SSL termination and secure your installation.