docs: add docker installation method

docs/introduction/installation.md

@@ -1,19 +1,27 @@
 # Installation
 
+> **Note:** An installation of the Rust programming language is needed to compile Sabre.
+
+## Cargo
+
+The fastest way to get up and running is to install the [latest published version](https://crates.io/crates/sabre-lang) via cargo:
+
+```sh
+cargo install sabre-lang
+```
+
 ## Git
 
-The fastest way to get up and running is to clone the [repository](https://git.sr.ht/~garritfra/sabre) and run the following command:
+To get the current development version, you can clone the Git [repository](https://github.com/garritfra/sabre) and run the following command:
 
 ```sh
 cargo install --path .
 ```
 
-> **Note:** An installation of the Rust programming language is needed to compile Sabre.
-
-## Cargo
+## Docker
 
-Install the [latest published version](https://crates.io/crates/sabre-lang) via cargo:
+Sabre provides a [Docker image](https://hub.docker.com/r/garritfra/sabre). It currently only supports the x64 architecture. Please reach out if you need a ARM variant (needed for Raspberry Pi). If you don't want to wait, you can build the image yourself by running this command in the root of the project:
 
-```sh
-cargo install sabre-lang
+```
+docker build . -t sabre
 ```