Updated documentation

docs/readme.md

@@ -2,14 +2,54 @@
 
 A programming language that quickly compiles to machine code.
 
+## Goals
+
+- Fast compilation
+- High performance
+- Tiny executables
+
+## Installation
+
+```shell
+git clone https://git.urbach.dev/cli/q
+cd q
+go build
+```
+
+## Usage
+
+```shell
+q build examples/hello
+./examples/hello/hello
+```
+
+## Tests
+
+```shell
+go run gotest.tools/gotestsum@latest
+```
+
 ## Platforms
 
+You can cross-compile executables for Linux, Mac and Windows using arm64 or x86-64.
+
+```shell
+q build examples/hello --os linux
+q build examples/hello --os mac
+q build examples/hello --os windows
+q build examples/hello --arch x86
+q build examples/hello --arch arm
+```
+
 | CPU    | Linux | Mac | Windows |
 | ------ | ----- | --- | ------- |
-| arm64  | ✅    | ❔  | ❔      |
-| x86-64 | ✅    | ✅  | ✅      |
+| arm64  | ✔️    | ❔  | ❔      |
+| x86-64 | ✔️    | ✔️  | ✔️      |
 
-Those marked with a ❔ are theoretically supported but there are no developer machines to test them.
+## Status
+
+`q` is under heavy development and not ready for production yet.
+Feel free to [get in touch](https://urbach.dev/contact) if you are interested in helping out.
 
 ## License