Simple getting started doc (#91)

* simple getting started doc

* Swap Old Ubuntu and Solc

* Fixes indents and removes OS preferences

* drops indents from code blocks

docs/Getting Started.md

@@ -0,0 +1,59 @@
+# Getting Started
+
+## Clone Serai
+```
+git clone https://github.com/serai-dex/serai.git
+```
+
+## Build and Run Serai
+
+### Install Rust
+
+#### Linux
+```
+curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
+```
+
+#### Windows
+
+Use WSL2 and Linux instructions.
+
+
+#### Mac
+
+```
+brew install rustup
+```
+
+### Install Solidity Compiler
+```
+sudo pip3 install solc-select
+solc-select install 0.8.16
+solc-select use 0.8.16
+```
+### Install Other Dependencies
+```
+sudo apt-get install -y \
+cmake \
+libboost-all-dev \
+pkg-config \
+libssl-dev
+```
+
+### Build
+```
+cd serai
+cargo build --release
+```
+
+### Run
+```
+./target/release/serai-node --chain dev
+OR
+./target/release/serai-node --dev
+```
+
+### Help
+```
+./target/release/serai-node --help
+```