ci: add unit tests

.github/workflows/main.yml

@@ -1,4 +1,4 @@
-name: Release Image
+name: GitHub Action
 on: push
 
 jobs:
@@ -10,14 +10,26 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: 1.22
-          cache: false
-      - name: golangci-lint
-        uses: golangci/golangci-lint-action@v4
+      - uses: golangci/golangci-lint-action@v4
         with:
           version: v1.55
 
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: 1.22
+      - name: Test
+        run: go test `go list ./... | grep -v test`
+
   build-push-image:
     runs-on: ubuntu-latest
+    needs:
+      - lint
+      - test
+    if: github.ref == 'refs/heads/main'
     steps:
       - name: Checkout repo
         uses: actions/checkout@v3