feat: caching go dependencies & build caches to speed up workflows

Signed-off-by: Daniel Hu <[email protected]>

Author: daniel-hutao

.github/workflows/pr-builder.yml

@@ -14,6 +14,14 @@ jobs:
       uses: actions/setup-go@v2
       with:
         go-version: 1.17
+    - uses: actions/cache@v2
+      with:
+        path: |
+          ~/.cache/go-build
+          ~/go/pkg/mod
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        restore-keys: |
+          ${{ runner.os }}-go-
     - name: Build
       run: make build
     - name: Test