Refactor project structure: modularized code into pkg and cmd directories, added unit tests, improved CI/CD pipeline, and enhanced documentation.

.gitea/workflows/ci.yml

@@ -0,0 +1,28 @@
+name: CI
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+jobs:
+  build-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: '1.21'
+      - name: Run tests with coverage
+        run: |
+          go test -v -coverprofile=coverage.out ./...
+          go tool cover -func=coverage.out | tee coverage.txt
+          cov=$(go tool cover -func=coverage.out | grep total: | awk '{print substr($3, 1, length($3)-1)}')
+          cov=${cov%.*}
+          if [ "$cov" -lt 80 ]; then
+            echo "::warning::Test coverage is below 80% ($cov%)"
+          fi
+      - name: Build Docker image
+        run: docker build -t diun-webhook-dashboard .
+