Add tutorial for building and running hello-world.wasm (#1285)

* Add tutorial for building and running hello-world.wasm

* Fix issues with directory trees in last commit

* Add more information on various ways of creating .wasm files and running them with Wasmtime

* Fix internal links and add more information on Wasmtime CLI installation

docs/tutorial-run-hello-world.md

@@ -1,3 +1,28 @@
 # Running `hello-world.wasm` with Wasmtime
 
-... more coming soon
+## Installing Wasmtime
+
+The Wasmtime CLI can be installed on Linux and macOS with a small install
+script:
+
+```sh
+$ curl https://wasmtime.dev/install.sh -sSf | bash
+```
+
+You can find more information about installing the Wasmtime CLI in the
+[CLI Installation section](./cli-install.md)
+
+## Running `hello-world.wasm`
+
+There are a number of ways to run a `.wasm` file with Wasmtime. In this
+tutorial, we'll be using the CLI, Wasmtime can also be embedded in your
+applications. More information on this can be found in the
+[Embedding Wasmtime section](./embed.md).
+
+If you've built the `hello-world.wasm` file (the instructions for doing so are in the
+[previous section](./tutorial-create-hello-world.md)),
+you can run it with Wasmtime from the command line like so:
+
+```sh
+$ wasmtime target/wasm32-wasi/debug/hello-world.wasm
+```