add hugo link checker

.github/workflows/main.workflow

@@ -0,0 +1,18 @@
+workflow "Hugo Link Check" {
+  resolves = "linkcheck"
+  on = "pull_request"
+}
+
+action "filter-to-pr-open-synced" {
+  uses = "actions/bin/filter@master"
+  args = "action 'opened|synchronize'"
+}
+
+action "linkcheck" {
+  uses = "marccampbell/hugo-linkcheck-action@v0.1.3"
+  needs = "filter-to-pr-open-synced"
+  secrets = ["GITHUB_TOKEN"]
+  env = {
+    HUGO_FINAL_URL = "https://blog.colinx.one"
+  }
+}