chore: refine Docker build process and update context paths

- Updated GitHub Actions workflow to specify the Dockerfile location and set the build context to the root of the repository.
- Modified Dockerfile to copy backend and other required modules from their respective directories, improving the build process.

.github/workflows/docker-crawlab.yml

@@ -199,7 +199,8 @@ jobs:
       - name: Build and push image
         uses: docker/build-push-action@v5
         with:
-          context: ${{ env.IMAGE_PATH_CRAWLAB_BACKEND }}
+          context: .
+          file: ${{ env.IMAGE_PATH_CRAWLAB_BACKEND }}/Dockerfile
           push: true
           tags: ${{ env.IMAGE_NAME_CRAWLAB_BACKEND }}:${{ needs.setup.outputs.version }}
       - name: Set output

backend/Dockerfile

@@ -1,9 +1,18 @@
 FROM golang:1.22.9 AS build
 
+# Context path is the root of the repository
+
 WORKDIR /go/src/app
 
-# Copy all required modules from parent directory
-COPY .. .
+# Copy the current directory (backend) first
+COPY ./backend ./backend/
+
+# Copy required modules from relative paths
+COPY ./core ./core/
+COPY ./db ./db/
+COPY ./grpc ./grpc/
+COPY ./trace ./trace/
+COPY ./vcs ./vcs/
 
 ENV GO111MODULE on