docs: add go install instructions (#190)

Depends on #189

This PR adds another way of installing `avs-devnet`, with `go install`.

README.md

@@ -19,17 +19,29 @@ Also, only contracts inside foundry projects are supported as of now.
 
 For development, we require [the `go` toolchain to be installed](https://go.dev/doc/install).
 
+## How to install
+
+### Using `go` toolchain
+
+To install the devnet using the `go` toolchain:
+
+```sh
+go install github.com/Layr-Labs/avs-devnet/cmd/avs-devnet
+```
+
 > [!IMPORTANT]  
-> To be able to [install the CLI via `go`](#installation), you'll need to add `$HOME/go/bin` to your `PATH`.
-> You can do so by adding to your `~/.bashrc` (or the equivalent for your shell) the following line:
+> To be able to use the CLI when installed via `go`, you'll need to add `GOBIN` (by default `$HOME/go/bin`) to your `PATH`.
+> You can do so by adding to your `~/.bashrc`, or the equivalent for your shell, the following line:
 >
 > ```bash
 > export PATH="$PATH:$HOME/go/bin"
 > ```
+>
+> More information [on the Go wiki](https://go.dev/wiki/GOPATH).
 
-## Installation
+### With a local copy of the repo
 
-To build and install the CLI locally, run:
+To build and install the CLI with a local copy of the repo, first clone the repo, and then run:
 
 ```sh
 make deps      # installs dependencies

src/cmds/flags/flags.go

@@ -6,7 +6,7 @@ import "github.com/urfave/cli/v2"
 // TODO: move to constants.
 //
 //nolint:gochecknoglobals // this is a constant
-var DefaultKurtosisPackage string = ""
+var DefaultKurtosisPackage string = "github.com/Layr-Labs/avs-devnet/kurtosis_package"
 
 //nolint:gochecknoglobals // these are constants
 var (