refactor: use machine resources to build with parallelism

.github/workflows/build.yml

@@ -193,14 +193,6 @@ jobs:
           . .tvm/bin/activate
           tutor distro run-extra-commands
 
-      - name: Prepare docker if building MFE
-        if: ${{ inputs.SERVICE == 'mfe' }}
-        shell: bash
-        run: |
-          echo "[worker.oci]" > buildkit.toml
-          echo "max-parallelism = 2" >> buildkit.toml
-          docker buildx create --use --node=max2cpu --driver=docker-container --config=./buildkit.toml
-
       - name: Build service image with no cache
         shell: bash
         working-directory: ${{ inputs.STRAIN_PATH }}/${{ env.TUTOR_APP_NAME }}