CI: add github workflow to build docker image

Author: vasiliy-t

.github/workflows/main.yml

@@ -0,0 +1,21 @@
+name: "main"
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build:
+    name: "Build docker image"
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - uses: actions/setup-go@v2
+        with:
+          go-version: '1.17'
+      
+      - name: Build
+        run: make build

go.mod

@@ -1,4 +1,4 @@
-module github.com/cert-manager/webhook-example
+module github.com/vasiliy-t/cert-manager-webhook-vkcloud
 
 go 1.13
 

main.go

@@ -11,12 +11,12 @@ import (
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/rest"
 
-	"github.com/cert-manager/webhook-example/vkcloud"
 	"github.com/gophercloud/gophercloud"
 	"github.com/jetstack/cert-manager/pkg/acme/webhook/apis/acme/v1alpha1"
 	"github.com/jetstack/cert-manager/pkg/acme/webhook/cmd"
 	"github.com/jetstack/cert-manager/pkg/issuer/acme/dns/util"
 	"github.com/pkg/errors"
+	"github.com/vasiliy-t/cert-manager-webhook-vkcloud/vkcloud"
 	core "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )