Create tech stack docs (techstack.yml and techstack.md)

[stack-file]

Adding tech stack documentation to allow anyone to easily see what is being used in this repo without digging through config files. Two files are being added: techstack.yml and techstack.md. techstack.yml contains data on all the technologies being used in this repo. techstack.md is a visualization of the YML file and displays the tech stack data in a pretty Markdown file.

💡 Protip: techstack.md contains a comment at the top of the file that the following README snippet (with and without the logos) at the top of the file as a comment:

<--- Readme.md Snippet without images Start --->

Tech Stack

Clivern/Beagle is built on the following main stack:

• PHP – Languages
• Redis – In-Memory Databases
• Symfony – Frameworks (Full Stack)
• Guzzle – Microframeworks (Backend)
• Prometheus – Monitoring Tools
• Grafana – Monitoring Tools
• Alpine Linux – Operating Systems
• GitHub Actions – Continuous Integration
• Travis CI – Continuous Integration

Full tech stack here

<--- Readme.md Snippet without images End --->

Get the code:

## Tech Stack
Clivern/Beagle is built on the following main stack:

- [PHP](http://www.php.net/) – Languages
- [Redis](http://redis.io/) – In-Memory Databases
- [Symfony](http://symfony.com/) – Frameworks (Full Stack)
- [Guzzle](http://guzzlephp.org/) – Microframeworks (Backend)
- [Prometheus](http://prometheus.io/) – Monitoring Tools
- [Grafana](http://grafana.org/) – Monitoring Tools
- [Alpine Linux](https://www.alpinelinux.org/) – Operating Systems
- [GitHub Actions](https://github.com/features/actions) – Continuous Integration
- [Travis CI](http://travis-ci.com/) – Continuous Integration

Full tech stack [here](/techstack.md)

---

<--- Readme.md Snippet with images Start --->

Tech Stack

Clivern/Beagle is built on the following main stack:

• PHP – Languages
• Redis – In-Memory Databases
• Symfony – Frameworks (Full Stack)
• Guzzle – Microframeworks (Backend)
• Prometheus – Monitoring Tools
• Grafana – Monitoring Tools
• Alpine Linux – Operating Systems
• GitHub Actions – Continuous Integration
• Travis CI – Continuous Integration

Full tech stack here

<--- Readme.md Snippet with images End --->

Get the code:

## Tech Stack
Clivern/Beagle is built on the following main stack:

- <img width='25' height='25' src='https://img.stackshare.io/service/991/hwUcGZ41_400x400.jpg' alt='PHP'/> [PHP](http://www.php.net/) – Languages
- <img width='25' height='25' src='https://img.stackshare.io/service/1031/default_cbce472cd134adc6688572f999e9122b9657d4ba.png' alt='Redis'/> [Redis](http://redis.io/) – In-Memory Databases
- <img width='25' height='25' src='https://img.stackshare.io/service/1197/logosf_positif_03_icon.png' alt='Symfony'/> [Symfony](http://symfony.com/) – Frameworks (Full Stack)
- <img width='25' height='25' src='https://img.stackshare.io/service/2350/638632.png' alt='Guzzle'/> [Guzzle](http://guzzlephp.org/) – Microframeworks (Backend)
- <img width='25' height='25' src='https://img.stackshare.io/service/2501/default_3cf1b307194b26782be5cb209d30360580ae5b3c.png' alt='Prometheus'/> [Prometheus](http://prometheus.io/) – Monitoring Tools
- <img width='25' height='25' src='https://img.stackshare.io/service/2645/default_8f9d552b144493679449b16c79647da5787e808b.jpg' alt='Grafana'/> [Grafana](http://grafana.org/) – Monitoring Tools
- <img width='25' height='25' src='https://img.stackshare.io/service/6429/alpine_linux.png' alt='Alpine Linux'/> [Alpine Linux](https://www.alpinelinux.org/) – Operating Systems
- <img width='25' height='25' src='https://img.stackshare.io/service/11563/actions.png' alt='GitHub Actions'/> [GitHub Actions](https://github.com/features/actions) – Continuous Integration
- <img width='25' height='25' src='https://img.stackshare.io/service/460/Lu6cGu0z_400x400.png' alt='Travis CI'/> [Travis CI](http://travis-ci.com/) – Continuous Integration

Full tech stack [here](/techstack.md)