Add one-shot CLI installation bash script

.golangci.yml

@@ -10,6 +10,12 @@ linters:
     - gosec
     - revive
     - misspell
+  exclusions:
+    rules:
+      - path: _test\.go
+        linters:
+          - gosec
+        text: "G101"
 
 formatters:
   enable:

README.md

@@ -24,6 +24,24 @@ Note: The install path includes `/cmd/hb` so Go installs the `hb` binary name.
 
 Pre-built binaries for Linux, macOS, and Windows are available on the [GitHub releases page](https://github.com/honeybadger-io/cli/releases).
 
+### Install Script
+
+On Linux and macOS, you can use the install script to download the binary:
+
+```bash
+curl -sSL https://raw.githubusercontent.com/honeybadger-io/cli/main/install.sh | bash
+```
+
+No `sudo` required — the binary installs to `~/.local/bin` by default. When run as root, it installs to `/usr/local/bin`.
+
+To also set up a systemd service for the [metrics agent](#reporting-api-commands):
+
+```bash
+curl -sSL https://raw.githubusercontent.com/honeybadger-io/cli/main/install.sh | sudo bash -s -- --service --api-key YOUR_API_KEY
+```
+
+Run with `--help` for all options including `--version`, `--interval`, and `--install-dir`.
+
 ## Configuration
 
 The CLI can be configured using either command-line flags, environment variables, or a configuration file.

cmd/root.go

@@ -55,6 +55,12 @@ func Execute() error {
 func init() {
 	cobra.OnInitialize(initConfig)
 
+	if Version != "" {
+		rootCmd.Version = Version
+	} else {
+		rootCmd.Version = "dev"
+	}
+
 	// Add command groups
 	rootCmd.AddGroup(&cobra.Group{
 		ID:    GroupReportingAPI,