remove dot from docker build context

Author: leighmcculloch

.github/workflows/newbuild.yml

@@ -234,7 +234,6 @@ jobs:
         -f Dockerfile
         -t ${{ env.image_repo }}:${{ steps.tag.outputs.tag }}
         --label org.opencontainers.image.revision="${{ env.sha }}"
-        .
         --build-arg REVISION="${{ env.sha }}"
         --build-arg PROTOCOL_VERSION_DEFAULT="${{ matrix.image.config.protocol_version_default }}"
         --build-arg XDR_IMAGE_REF=stellar-xdr:${{ matrix.arch }}
@@ -243,6 +242,7 @@ jobs:
         --build-arg HORIZON_IMAGE_REF=stellar-horizon:${{ matrix.arch }}
         --build-arg FRIENDBOT_IMAGE_REF=stellar-friendbot:${{ matrix.arch }}
         --build-arg LAB_IMAGE_REF=stellar-lab:${{ matrix.arch }}
+        .
     - name: Save Quickstart Image
       run: docker save ${{ steps.tag.outputs.tag }} -o /tmp/image
     - name: Upload Quickstart Image