Fixes linting errors

Author: simonbs

.github/workflows/build-docker-image.yml

@@ -16,5 +16,7 @@ jobs:
     steps:
       - name: Checkout Repository
         uses: actions/checkout@v4
+        with:
+          persist-credentials: false
       - name: Build Docker Image
         run: docker build .

.github/workflows/test-sql-queries.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     services:
       postgres:
-        image: postgres:latest
+        image: postgres:6efd0df010dc3cb40d5e33e3ef84acecc5e73161bd3df06029ee8698e5e12c60
         ports:
           - 5432:5432
         options: >-