Update README.md

Author: ashenmagic

README.md

@@ -1,4 +1,55 @@
-# Portal Net
+# Portal
 
-Portal Net is a peer-to-peer library and standalone executable designed to
+Portal is a peer-to-peer library and standalone executable designed to
 make peer-to-peer networking more accessible.
+
+## Downloads
+
+### Direct downloads
+
+* [All releases](https://github.com/sogouda/portal/releases)
+* [Latest release](https://github.com/sogouda/portal/releases/latest)
+
+### npm *(Node Package Manager)*
+
+```sh
+npm i -g @sogouda/portal
+```
+
+## Usage
+
+Replace `portal` in the following commands with the name of your `portal` executable.
+
+Operating system | Executable name
+---------------- | ---------------
+Linux            | `portal`
+Windows          | `portal.exe`
+Mac / OS X       | `portal-osx`
+
+### Host a server
+
+Run the following command *(replace `25565` with the port number of your server)*.
+
+```sh
+portal port host -p 25565
+```
+
+You'll see output similar to the following:
+
+```json
+{"publicKey":"ed8d689b12d2a1998e7f284c16031bcb89cec5065c84e206975eebee438caf95"}
+```
+
+Copy the public key in between the parenthesis *(in this case, `ed8d689b12d2a1998e7f284c16031bcb89cec5065c84e206975eebee438caf95`)*.
+Send this code to your friend.
+This is the code that your friend will need to paste in the following steps for [joining a server](#join-a-server).
+
+### Join a server
+
+Run the following command *(replace `ed8d689b12d2a1998e7f284c16031bcb89cec5065c84e206975eebee438caf95` with [the public key of your server](#host-a-server))*.
+
+```sh
+portal port join -p 25565 ed8d689b12d2a1998e7f284c16031bcb89cec5065c84e206975eebee438caf95
+```
+
+This will output a JSON string containing the connection details.