actions: pass UID and GID to PR builds of dockerfiles

.github/workflows/main.yml

@@ -241,7 +241,11 @@ jobs:
       working-directory: ${{ env.docker-config-path }}
       if: matrix.platform.container.name != ''
     - name: Create container
-      run: docker build -t ${{ env.docker-registry-container-sha }} -f ${{ env.dockerfile }} .
+      run: |
+        if [ "${{ matrix.container.base }}" != "" ]; then
+          BASE_ARG="--build-arg BASE=${{ matrix.container.base }}"
+        fi
+        docker build -t ${{ env.docker-registry-container-sha }} --build-arg UID=$(id -u) --build-arg GID=$(id -g) ${BASE_ARG} -f ${{ env.dockerfile }} .
       working-directory: ${{ env.docker-config-path }}
       if: matrix.platform.container.name != '' && env.docker-container-exists != 'true'
     - name: Build and test