Fix: Provided Correct Tag for Build stage

Author: Varnit01-dev

.github/workflows/ci.yml

@@ -41,14 +41,16 @@ jobs:
       - name: Login to DockerHub
         uses: docker/login-action@v3
         with:
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_TOKEN }}
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Build and push Docker image
         uses: docker/build-push-action@v5
         with:
           context: .
           push: true
-          tags: ${{ secrets.DOCKER_USERNAME }}/go_webapp:latest
+          tags: |
+            ${{ secrets.DOCKERHUB_USERNAME }}/go_webapp:latest
+            ${{ secrets.DOCKERHUB_USERNAME }}/go_webapp:${{ github.sha }}
           cache-from: type=gha
           cache-to: type=gha,mode=max