Add build instructions to readme (FuelLabs#282)

* Add CI badge.

* Add community badge.

* Update readme.

* Fix typo.

* Fix typo.

* Install to Cargo bin.

* Heading.

README.md

@@ -1,13 +1,54 @@
 # Sway
 
+[![Compile and Test](https://github.com/FuelLabs/sway/actions/workflows/cargo_test.yml/badge.svg)](https://github.com/FuelLabs/sway/actions/workflows/cargo_test.yml)
+[![Community](https://img.shields.io/badge/chat%20on-discord-orange?&logo=discord&logoColor=ffffff&color=7389D8&labelColor=6A7EC2)](https://discord.gg/xfpK4Pe)
+
 Sway is a language developed for the Fuel blockchain. It is heavily inspired by Rust and aims to bring modern language development and performance to the blockchain ecosystem.
 
-## Running the Compiler
+## Documentation
+
+For user documentation, see the Sway Book: <https://fuellabs.github.io/sway/latest/>.
+
+## Building from Source
 
-To run the compiler from this directory:
+### Dependencies
 
-```sh
-cargo run --bin forc -- -p <path_to_project>
-cargo run --bin forc -- build -p example_project/fuel_project
+Sway is built in Rust. To begin, install the Rust toolchain following instructions at <https://www.rust-lang.org/tools/install>. Then configure your Rust toolchain to use Rust `stable`:
+
+```console
+rustup default stable
 ```
 
+If not already done, add the Cargo bin directory to your `PATH` by adding the following line to `~/.profile` and restarting the shell session.
+
+```console
+export PATH="${HOME}/.cargo/bin:${PATH}"
+```
+
+To ensure access to all dependent repositories, [create](https://docs.github.com/en/authentication/connecting-to-github-with-ssh/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent) and [add](https://docs.github.com/en/authentication/connecting-to-github-with-ssh/adding-a-new-ssh-key-to-your-github-account) SSH keys to your GitHub account.
+
+### Building Sway
+
+Clone the repository and build the Sway toolchain:
+
+```console
+git clone [email protected]:FuelLabs/sway.git
+cd sway
+cargo build
+```
+
+Confirm the Sway toolchain built successfully:
+
+```console
+cargo run --bin forc -- --help
+# or
+./target/debug/forc --help
+```
+
+To run `forc` from any directory, install `forc` to your local Cargo bin directory:
+
+```console
+cargo install --path forc
+# Also install sway-server if using the IDE plugin
+cargo install --path sway-server
+```