Added review dog workflow

Author: KCarretto

.github/workflows/review_dog.yml

@@ -0,0 +1,20 @@
+name: Review Dog
+on: [pull_request]
+jobs:
+  reviewdog:
+    name: Review Dog
+    runs-on: ubuntu-latest
+    steps:
+      # ...
+      - name: Setup Review Dog
+        run: |
+          mkdir -p $HOME/bin && curl -sfL https://raw.githubusercontent.com/reviewdog/reviewdog/master/install.sh| sh -s -- -b $HOME/bin
+          echo ::add-path::$HOME/bin
+          echo ::add-path::$(go env GOPATH)/bin # for Go projects
+      - name: Run reviewdog
+        env:
+          REVIEWDOG_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          reviewdog -reporter=github-pr-check -runners=golint,govet
+          # or
+          reviewdog -reporter=github-pr-review -runners=golint,govet