It is handy to close strings.

.github/workflows/CI.yml

@@ -47,7 +47,7 @@ jobs:
           COMMIT_MESSAGE: ${{ github.event.head_commit.message }}
         run: |
           echo "MAILU_VERSION=pr-${COMMIT_MESSAGE//[!0-9]/}" >> $GITHUB_ENV
-          echo "DOCKER_ORG=${{ secrets.DOCKER_ORG_TESTS }} >> $GITHUB_ENV
+          echo "DOCKER_ORG=${{ secrets.DOCKER_ORG_TESTS }}" >> $GITHUB_ENV
       - name: Derive MAILU_VERSION for other branches than testing
         if: ${{ env.BRANCH != 'testing' }}
         shell: bash
@@ -55,7 +55,7 @@ jobs:
           MAILU_BRANCH: ${{ env.BRANCH }}
         run: |
           echo "MAILU_VERSION=${{ env.MAILU_BRANCH }}" >> $GITHUB_ENV
-          echo "DOCKER_ORG=${{ secrets.DOCKER_ORG }} >> $GITHUB_ENV	
+          echo "DOCKER_ORG=${{ secrets.DOCKER_ORG }}" >> $GITHUB_ENV	
       - name: Create folder for storing images
         run: |
           sudo mkdir -p /images