update readmes (#200)

Following on from Laravel's readme updates, apply the same to other readme files.
Add some badges, and a note to make clear that people are probably looking at a
read-only subtree split.
In passing, update wordpress dockerfile and metapackage to use RC

Author: brettmc

README.md

@@ -1,62 +1,24 @@
-# OpenTelemetry Laravel auto-instrumentation
+[![Releases](https://img.shields.io/badge/releases-purple)](https://github.com/opentelemetry-php/contrib-auto-laravel/releases)
+[![Issues](https://img.shields.io/badge/issues-pink)](https://github.com/open-telemetry/opentelemetry-php/issues)
+[![Source](https://img.shields.io/badge/source-contrib-green)](https://github.com/open-telemetry/opentelemetry-php-contrib/tree/main/src/Instrumentation/Laravel)
+[![Mirror](https://img.shields.io/badge/mirror-opentelemetry--php--contrib-blue)](https://github.com/opentelemetry-php/contrib-auto-laravel)
+[![Latest Version](http://poser.pugx.org/open-telemetry/opentelemetry-auto-laravel/v/unstable)](https://packagist.org/packages/open-telemetry/opentelemetry-auto-laravel/)
+[![Stable](http://poser.pugx.org/open-telemetry/opentelemetry-auto-laravel/v/stable)](https://packagist.org/packages/open-telemetry/opentelemetry-auto-laravel/)
 
-**Preferred and simplest way to install auto-instrumentation (c extension plus instrumentation libraries) is to use [opentelemetry-instrumentation-installer](https://github.com/open-telemetry/opentelemetry-php-contrib/tree/main/src/AutoInstrumentationInstaller).**
-**The same process can be done manually by installing [c extension](https://github.com/open-telemetry/opentelemetry-php-instrumentation#installation) plus all needed instrumentation libraries like [Laravel](#Installation-via-composer)**
+This is a read-only subtree split of https://github.com/open-telemetry/opentelemetry-php-contrib.
 
-## Requirements
+# OpenTelemetry Laravel auto-instrumentation
 
-* OpenTelemetry extension
-* OpenTelemetry SDK and exporters (required to actually export traces)
+Please read https://opentelemetry.io/docs/instrumentation/php/automatic/ for instructions on how to
+install and configure the extension and SDK.
 
 ## Overview
-Currently only root span creation is supported (Illuminate\Foundation\Http\Kernel::handle hook).
-
-To export spans, you will need to create and register a `TracerProvider` early in your application's
-lifecycle. This can be done either manually or using SDK autoloading.
-
-### Using SDK autoloading
-
-See https://github.com/open-telemetry/opentelemetry-php#sdk-autoloading
-
-### Manual setup
-
-```php
-<?php
-require_once 'vendor/autoload.php';
-
-$tracerProvider = /*create tracer provider*/;
-$scope = \OpenTelemetry\API\Instrumentation\Configurator::create()
-    ->withTracerProvider($tracerProvider)
-    ->activate();
-
-//your application runs here
-
-$scope->detach();
-$tracerProvider->shutdown();
-```
-
-## Installation via composer
-
-```bash
-$ composer require open-telemetry/opentelemetry-auto-laravel
-```
-
-## Installing dependencies and executing tests
-
-From Laravel subdirectory:
-
-```bash
-$ composer install
-$ ./vendor/bin/phpunit tests
-```
+Auto-instrumentation hooks are registered via composer, and spans will automatically be created.
 
 ## Configuration
 
-Parts of this auto-instrumentation library can be configured, more options are available throught the
-[General SDK Configuration](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/sdk-environment-variables.md#general-sdk-configuration):
+The extension can be disabled via [runtime configuration](https://opentelemetry.io/docs/instrumentation/php/sdk/#configuration):
 
-| Name                                | Default value | Values                  | Example | Description                                                                     |
-|-------------------------------------|---------------|-------------------------|---------|---------------------------------------------------------------------------------|
-| OTEL_PHP_DISABLED_INSTRUMENTATIONS  | []            | Instrumentation name(s) | laravel | Disable one or more installed auto-instrumentations, names are comma seperated. |
-
-Configurations can be provided as environment variables, or via `php.ini` (or a file included by `php.ini`)
+```shell
+OTEL_PHP_DISABLED_INSTRUMENTATIONS=laravel
+```