message: doc(build): add entry for --out-dir
diff: @@ -20,6 +20,18 @@ wasm-pack build examples/js-hello-world
  This path should point to a directory that contains a `Cargo.toml` file. If no
  path is given, the `build` command will run in the current directory.
  +## Output Directory
  +
  +By default, `wasm-pack` will generate a directory for it's build output called `pkg`.
  +If you'd like to customize this you can use the `--out-dir` flag.
  +
  +```
  +wasm-pack build --out-dir out
  +```
  +
  +The above command will put your build artifacts in a directory called `out`, instead
  +of the default `pkg`.
  +
  ## Profile
  The `build` command accepts an optional profile argument: one of `--dev`,
  