Vendor packages and add Makefile

* Vendors packages
  * Adds a Makefile that uses docker to build a static binary against musl
using alpine linux.

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

cmd/garm-cli/cmd/root.go

@@ -23,6 +23,8 @@ import (
 	"github.com/spf13/cobra"
 )
 
+var Version string
+
 var (
 	cfg            *config.Config
 	mgr            config.Manager

cmd/garm-cli/cmd/version.go

@@ -0,0 +1,35 @@
+// Copyright 2022 Cloudbase Solutions SRL
+//
+//    Licensed under the Apache License, Version 2.0 (the "License"); you may
+//    not use this file except in compliance with the License. You may obtain
+//    a copy of the License at
+//
+//         http://www.apache.org/licenses/LICENSE-2.0
+//
+//    Unless required by applicable law or agreed to in writing, software
+//    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+//    License for the specific language governing permissions and limitations
+//    under the License.
+
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+// runnerCmd represents the runner command
+var versionCmd = &cobra.Command{
+	Use:          "version",
+	SilenceUsage: true,
+	Short:        "Print version and exit",
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println(Version)
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(versionCmd)
+}