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

dreamfactorysoftware/df-mongo-logs is built on the following main stack:

• PHP – Languages
• MongoDB – Databases
• PHPUnit – Testing Frameworks
• Ubuntu – Operating Systems
• Docker – Virtual Machine Platforms & Containers

Full tech stack here

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

Get the code:

## Tech Stack
dreamfactorysoftware/df-mongo-logs is built on the following main stack:

- [PHP](http://www.php.net/) – Languages
- [MongoDB](http://www.mongodb.com/) – Databases
- [PHPUnit](https://phpunit.de/) – Testing Frameworks
- [Ubuntu](http://www.ubuntu.com/) – Operating Systems
- [Docker](https://www.docker.com/) – Virtual Machine Platforms & Containers

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

---

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

Tech Stack

dreamfactorysoftware/df-mongo-logs is built on the following main stack:

• PHP – Languages
• MongoDB – Databases
• PHPUnit – Testing Frameworks
• Ubuntu – Operating Systems
• Docker – Virtual Machine Platforms & Containers

Full tech stack here

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

Get the code:

## Tech Stack
dreamfactorysoftware/df-mongo-logs 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/1030/leaf-360x360.png' alt='MongoDB'/> [MongoDB](http://www.mongodb.com/) – Databases
- <img width='25' height='25' src='https://img.stackshare.io/service/1616/1_WsEnddd5Y4EgEHsT054kUQ.jpeg' alt='PHPUnit'/> [PHPUnit](https://phpunit.de/) – Testing Frameworks
- <img width='25' height='25' src='https://img.stackshare.io/service/3511/cof_orange_hex.jpg' alt='Ubuntu'/> [Ubuntu](http://www.ubuntu.com/) – Operating Systems
- <img width='25' height='25' src='https://img.stackshare.io/service/586/n4u37v9t_400x400.png' alt='Docker'/> [Docker](https://www.docker.com/) – Virtual Machine Platforms & Containers

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