docs: update README

Signed-off-by: Thorsten Hans <[email protected]>

README.md

@@ -88,8 +88,78 @@ You can use the following arguments to customize versions installed as part of t
 
 ## The `eject` command
 
-TBD
+You can export the default template using the `eject` command. Without specifying additional arguments or flags, the template will be written to `stdout`:
 
-### Template Variables
+```bash
+spin gh eject
+```
+
+Alternatively, you can write it to a file using the `output` (short `o`) and the `overwrite` flags:
+
+```bash
+spin gh eject -o ci.yaml --overwrite
+```
 
-TBD
+### Template Data
+
+The following table lists the data passed to the template as part of the `create-action` command:
+
+
+| Field | DataType | Description | Sample Value |
+|-------|----------|-------------|--------------|
+| `ActionName` | `string` | Name of the workflow | `CI` |
+| `OperatingSystem` | `string` | Desired Operating System | `ubuntu-latest` |
+| `ActionTriggers` | `ActionTriggers` | Desired triggers | See ActionTriggers section below |
+| `EnvironmentVariables` | `[]EnvVar` | Slice with environment variables | (See EnvVar section below) |
+| `Tools` | `Tools` | Desired tool versions | see Tools section below |
+| `SpinPlugins` | `string` | A comma separated list of Spin plugins | `js2wasm,kube` |
+| `Rust` | `bool` | Indicates if any Spin App or Component is built with Rust | `true` |
+| `Go` | `bool` | Indicates if any Spin App or Component is built with Go | `true` |
+| `JavaScript` | `bool` | Indicates if any Spin App or Component is built with JavaScript | `true` |
+| `Python` | `bool` | Indicates if any Spin App or Component is built with Python | `true` |
+| `SpinApps` | `[]spinAppTemplateData` | Information for every Spin App discovered | See SpinAppTemplateData section below |
+
+#### ActionTriggers
+
+| Field | DataType | Description | Sample Value |
+|-------|----------|-------------|--------------|
+| `ManualDispatch` | `bool` | Is `workflow_dispatch` enabled | `true` |
+| `Cron` | `string` | trigger cron expression | `0 2 * * *` |
+| `PullRequest` | `string` | trigger for PRs targeting the specified branch | `main` |
+| `Push` | `string` | trigger for every push on the specified branch | `main` |
+
+#### EnvVar
+
+| Field | DataType | Description | Sample Value |
+|-------|----------|-------------|--------------|
+| `Key` | `string` | Name of the environment variable | `FOO` |
+| `Value` | `string` | Name of the environment variable | `bar` |
+
+#### Tools
+
+| Field | DataType | Description | Sample Value |
+|-------|----------|-------------|--------------|
+| `Rust` | `string` | Desired Rust Version | `1.80.1` |
+| `Go` | `string` | Desired Rust Version | `1.23.2` |
+| `TinyGo` | `string` | Desired Rust Version | `0.33.0` |
+| `Python` | `string` | Desired Rust Version | `3.13.0` |
+| `Node` | `string` | Desired Rust Version | `22` |
+| `Spin` | `string` | Desired Rust Version | `2.7.0` |
+
+#### SpinAppTemplateData
+
+| Field | DataType | Description | Sample Value |
+|-------|----------|-------------|--------------|
+| `Name` | `string` | Name of the Spin App | `spin-app-1` |
+| `Path` | `string` | Name of the Spin App | `./src/app1` |
+| `Setup` | `string` | Per Spin App setup scripts | `python3 -m venv venv && source venv/bin/activate` |
+| `Teardown` | `string` | Name of the Spin App | `deactivate` |
+| `Components` | `[]componentTemplateData` | Information for every Component of the App | See ComponentTemplateData section below |
+
+#### ComponentTemplateData
+
+| Field | DataType | Description | Sample Value |
+|-------|----------|-------------|--------------|
+| `Language` | `string` | Name of the Language used for this component (Rust, Go, JavaScript, Python) App | `Rust` |
+| `Path` | `string` | Path of the component | `./src/app1/api` |
+| `InstallDependenciesCommand` | `string` | Command used to install component dependencies | `npm install` |