Enhance GitHub Actions workflows: added linting, test coverage, and D…

…ocker build steps

.github/workflows/ci.yml

@@ -1,4 +1,4 @@
-name: Go CI
+name: Go CI/CD
 
 on:
   push:
@@ -9,7 +9,8 @@ on:
       - main
 
 jobs:
-  build-and-test:
+  test:
+    name: Test
     runs-on: ubuntu-latest
 
     steps:
@@ -30,10 +31,73 @@ jobs:
             ${{ runner.os }}-go-
 
       - name: Install dependencies
-        run: |
-          go mod tidy || echo "Skipping go mod tidy as no dependencies exist"
+        run: go mod tidy
+
+      - name: Run unit tests
+        run: go test ./... -v -coverprofile=coverage.out
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v3
+        with:
+          files: coverage.out
+          fail_ci_if_error: true
+
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
 
-      - name: Run tests
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: 1.21
+
+      - name: Install golangci-lint
         run: |
-          go test ./... || echo "No tests to run"
+          curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $GOPATH/bin v1.54.2
+
+      - name: Run golangci-lint
+        run: golangci-lint run ./...
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    needs: [test, lint]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: 1.21
+
+      - name: Build application
+        run: go build -v ./...
+
+  docker-build:
+    name: Docker Build
+    runs-on: ubuntu-latest
+    needs: [build]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Log in to DockerHub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          push: true
+          tags: ${{ secrets.DOCKER_USERNAME }}/go-fantasy-pl:latest