Added Questions & Answers (#387)

* ReadMe Network Q&A Grammar and Spelling Changes

* Grammarly spelling and grammar check

* Api GateWay? Answered

* Advantages of API gateway

* fixed advantages

* What is HTTPS? Answered

* What is a proxy?

* Reverse Proxy?

* Creative Commons License

* Creative Commons Source

* Memory Leak?

* What is a fileSystem?

* What are unit tests?

* OSPF explained

* OSPF source, learn more link

* Disaster Recovery Explained

* Regex numbers

* First & Last Word of each line regex

* IP address Regex

* updated regex

* Extract email addresses regex

* updated regex

* Virtual Machines Still relevant

* deleted line

* Storage types

* Hardware Added Questions

* fixed details