docs: Update README.md & add CONTRIBUTING.md

CONTRIBUTING.md

@@ -0,0 +1,106 @@
+<p align="center">
+  <a href="https://sentry.io/?utm_source=github&utm_medium=logo" target="_blank">
+    <img src="https://sentry-brand.storage.googleapis.com/sentry-wordmark-dark-280x84.png" alt="Sentry" width="280" height="84">
+  </a>
+</p>
+
+# Contributing to the Sentry PHP SDK
+
+We welcome contributions to `sentry-php` by the community.
+
+Please search the [issue tracker](https://github.com/getsentry/sentry-php/issues) before creating a new issue (a problem or an improvement request). Please also ask in our [Sentry Community on Discord](https://discord.com/invite/Ww9hbqr) before submitting a new issue. There is a ton of great people in our Discord community ready to help you!
+
+If you feel that you can fix or implement it yourself, please read on to learn how to submit your changes.
+
+## Submitting changes
+
+- Setup the development environment.
+- Clone the `sentry-php` repository and prepare necessary changes.
+- Add tests for your changes to `tests/`.
+- Run tests and make sure all of them pass.
+- Submit a pull request, targeting the `develop` branch if you added any new features. For bug fixes of the current release, please target the `master` branch instead.
+- Make sure to update the `CHANGELOG.md` file below the `Unreleased` heading.
+
+We will review your pull request as soon as possible.
+Thank you for contributing!
+
+## Development environment
+
+### Clone the repository
+
+```bash
+git clone [email protected]:getsentry/sentry-php.git
+```
+
+Make sure that you have PHP 7.2+ installed. Version 7.4 or higher is required to run style checkers. On macOS, we recommend using brew to install PHP. For Windows, we recommend an official PHP.net release.
+
+### Install the dependencies
+
+Dependencies are managed through [Composer](https://getcomposer.org/):
+
+```bash
+composer install
+```
+
+### Running tests
+
+Tests can then be run via [PHPUnit](https://phpunit.de/):
+
+```bash
+vendor/bin/phpunit
+```
+
+## Releasing a new version
+
+(only relevant for Sentry employees)
+
+Prerequisites:
+
+- All changes that should be released must be in the `master` branch.
+- Every commit should follow the [Commit Message Format](https://develop.sentry.dev/commit-messages/#commit-message-format) convention.
+
+Manual Process:
+
+- Update CHANGELOG.md with the version to be released. Example commit: https://github.com/getsentry/sentry-php/commit/877bca3f0f0ac0fc8ec0a218c6070cccea266795.
+- On GitHub in the `sentry-php` repository go to "Actions" select the "Release" workflow.
+- Click on "Run workflow" on the right side and make sure the `master` branch is selected.
+- Set "Version to release" input field. Here you decide if it is a major, minor or patch release. (See "Versioning Policy" below)
+- Click "Run Workflow"
+
+This will trigger [Craft](https://github.com/getsentry/craft) to prepare everything needed for a release. (For more information see [craft prepare](https://github.com/getsentry/craft#craft-prepare-preparing-a-new-release)) At the end of this process, a release issue is created in the [Publish](https://github.com/getsentry/publish) repository. (Example release issue: https://github.com/getsentry/publish/issues/815)
+
+Now one of the persons with release privileges (most probably your engineering manager) will review this Issue and then add the `accepted` label to the issue.
+
+There are always two persons involved in a release.
+
+If you are in a hurry and the release should be out immediately there is a Slack channel called `#proj-release-approval` where you can see your release issue and where you can ping people to please have a look immediately.
+
+When the release issue is labeled `accepted` [Craft](https://github.com/getsentry/craft) is triggered again to publish the release to all the right platforms. (See [craft publish](https://github.com/getsentry/craft#craft-publish-publishing-the-release) for more information). At the end of this process, the release issue on GitHub will be closed and the release is completed! Congratulations!
+
+There is a sequence diagram visualizing all this in the [README.md](https://github.com/getsentry/publish) of the `Publish` repository.
+
+### Versioning Policy
+
+This project follows [semver](https://semver.org/), with three additions:
+
+- Semver says that major version `0` can include breaking changes at any time. Still, it is common practice to assume that only `0.x` releases (minor versions) can contain breaking changes while `0.x.y` releases (patch versions) are used for backwards-compatible changes (bugfixes and features). This project also follows that practice.
+
+- All undocumented APIs are considered internal. They are not part of this contract.
+
+- Certain features (e.g. integrations) may be explicitly called out as "experimental" or "unstable" in the documentation. They come with their own versioning policy described in the documentation.
+
+We recommend pinning your version requirements against `1.x.*` or `1.x.y`.
+Either one of the following is fine:
+
+```json
+"sentry/sentry": "^1.0",
+"sentry/sentry": "^1",
+```
+
+A major release `N` implies the previous release `N-1` will no longer receive updates. We generally do not backport bugfixes to older versions unless they are security relevant. However, feel free to ask for backports of specific commits on the bug tracker.
+
+## Commit message format guidelines
+
+See the documentation on commit messages here:
+
+https://develop.sentry.dev/commit-messages/#commit-message-format

README.md

@@ -6,12 +6,12 @@
 
 _Bad software is everywhere, and we're tired of it. Sentry is on a mission to help developers write better software faster, so we can get back to enjoying technology. If you want to join us [<kbd>**Check out our open positions**</kbd>](https://sentry.io/careers/)_
 
-# Sentry SDK for PHP
+# Offical Sentry SDK for PHP
 
-[![Total Downloads](https://poser.pugx.org/sentry/sentry/downloads)](https://packagist.org/packages/sentry/sentry)
-[![Monthly Downloads](https://poser.pugx.org/sentry/sentry/d/monthly)](https://packagist.org/packages/sentry/sentry)
 [![Latest Stable Version](https://poser.pugx.org/sentry/sentry/v/stable)](https://packagist.org/packages/sentry/sentry)
 [![License](https://poser.pugx.org/sentry/sentry/license)](https://packagist.org/packages/sentry/sentry)
+[![Total Downloads](https://poser.pugx.org/sentry/sentry/downloads)](https://packagist.org/packages/sentry/sentry)
+[![Monthly Downloads](https://poser.pugx.org/sentry/sentry/d/monthly)](https://packagist.org/packages/sentry/sentry)
 [![Discord](https://img.shields.io/discord/621778831602221064)](https://discord.gg/cWnMQeA)
 
 | Version | Build Status | Code Coverage |
@@ -23,7 +23,9 @@ The Sentry PHP error reporter tracks errors and exceptions that happen during th
 execution of your application and provides instant notification with detailed
 information needed to prioritize, identify, reproduce and fix each issue.
 
-## Install
+## Getting started
+
+### Install
 
 To install the SDK you will need to be using [Composer]([https://getcomposer.org/)
 in your project. To install it please see the [docs](https://getcomposer.org/download/).
@@ -54,26 +56,30 @@ you want to use because it's an implementation detail of your application. You m
 use any package that provides [`php-http/async-client-implementation`](https://packagist.org/providers/php-http/async-client-implementation)
 and [`http-message-implementation`](https://packagist.org/providers/psr/http-message-implementation).
 
-## Usage
+### Configuration
 
 ```php
 \Sentry\init(['dsn' => '___PUBLIC_DSN___' ]);
+```
+
+### Usage
 
+```php
 try {
     thisFunctionThrows(); // -> throw new \Exception('foo bar');
 } catch (\Exception $exception) {
     \Sentry\captureException($exception);
 }
 ```
 
-### Official integrations
+## Official integrations
 
 The following integrations are fully supported and maintained by the Sentry team.
 
 - [Symfony](https://github.com/getsentry/sentry-symfony)
 - [Laravel](https://github.com/getsentry/sentry-laravel)
 
-### 3rd party integrations
+## 3rd party integrations
 
 The following integrations are available and maintained by members of the Sentry community.
 
@@ -86,14 +92,14 @@ The following integrations are available and maintained by members of the Sentry
 - [CakePHP](https://github.com/Connehito/cake-sentry)
 - ... feel free to be famous, create a port to your favourite platform!
 
-### 3rd party integrations using old SDK 2.x
+## 3rd party integrations using old SDK 2.x
 
 - [Neos Flow](https://github.com/networkteam/Networkteam.SentryClient)
 - [OXID eShop](https://github.com/OXIDprojects/sentry)
 - [TYPO3](https://github.com/networkteam/sentry_client)
 - [CakePHP](https://github.com/Connehito/cake-sentry/tree/3.x)
 
-### 3rd party integrations using old SDK 1.x
+## 3rd party integrations using old SDK 1.x
 
 - [Neos CMS](https://github.com/networkteam/Netwokteam.Neos.SentryClient)
 - [OpenCart](https://github.com/BurdaPraha/oc_sentry)
@@ -105,25 +111,21 @@ The following integrations are available and maintained by members of the Sentry
 - [Bug Tracker](http://github.com/getsentry/sentry-php/issues)
 - [Code](http://github.com/getsentry/sentry-php)
 
-## Contributing
+## Contributing to the SDK
 
-Dependencies are managed through `composer`:
+Please refer to [CONTRIBUTING.md](CONTRIBUTING.md).
 
-```
-$ composer install
-```
+## Getting help/support
 
-Tests can then be run via phpunit:
+If you need help setting up or configuring the PHP SDK (or anything else in the Sentry universe) please head over to the [Sentry Community on Discord](https://discord.com/invite/Ww9hbqr). There is a ton of great people in our Discord community ready to help you!
 
-```
-$ vendor/bin/phpunit
-```
+## Resources
+
+- [![Documentation](https://img.shields.io/badge/documentation-sentry.io-green.svg)](https://docs.sentry.io/quickstart/)
+- [![Discord](https://img.shields.io/discord/621778831602221064)](https://discord.gg/Ww9hbqr)
+- [![Stack Overflow](https://img.shields.io/badge/stack%20overflow-sentry-green.svg)](http://stackoverflow.com/questions/tagged/sentry)
+- [![Twitter Follow](https://img.shields.io/twitter/follow/getsentry?label=getsentry&style=social)](https://twitter.com/intent/follow?screen_name=getsentry)
+
+## License
 
-[master Build Status]: https://github.com/getsentry/sentry-php/actions?query=workflow%3ACI+branch%3Amaster
-[master Build Status Image]: https://github.com/getsentry/sentry-php/workflows/CI/badge.svg?branch=master
-[develop Build Status]: https://github.com/getsentry/sentry-php/actions?query=workflow%3ACI+branch%3Adevelop
-[develop Build Status Image]: https://github.com/getsentry/sentry-php/workflows/CI/badge.svg?branch=develop
-[master Code Coverage]: https://codecov.io/gh/getsentry/sentry-php/branch/master
-[master Code Coverage Image]: https://img.shields.io/codecov/c/github/getsentry/sentry-php/master?logo=codecov
-[develop Code Coverage]: https://codecov.io/gh/getsentry/sentry-php/branch/develop
-[develop Code Coverage Image]: https://img.shields.io/codecov/c/github/getsentry/sentry-php/develop?logo=codecov
+Licensed under the BSD license, see [`LICENSE`](LICENSE)