using ubuntu-latest runner until docker-compose is installed on our s…

…elf-hosted runner

.github/workflows/ci-tests.yml

@@ -37,7 +37,7 @@ jobs:
         working-directory: ./frontend
         run: npm run lint
   Backend-tests:
-    runs-on: self-hosted
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
 
@@ -51,12 +51,6 @@ jobs:
         working-directory: ./backend
         run: pip3 install -r requirements.txt && pip3 install -r dev-requirements.txt
 
-      - name: Install Docker Compose
-        run: |
-          curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
-          chmod +x /usr/local/bin/docker-compose
-          docker-compose --version
-      
       - name: Running tests
         working-directory: ./backend
         run: bash ./run_tests.sh