ci: improve python setup in nightly workflow

.github/workflows/nightly.yaml

@@ -42,20 +42,12 @@ jobs:
       run: |
         echo ${{ env.URL }}
 
-    - name: Set up Python 3.10
+    - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: "3.10"
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install flake8 pytest
-        pip install pytest_dotenv
-        pip install pytest-reporter-html1
-
-    - name: Install pre-commit
-      run: |
-        pip install pre-commit
+        python-version: "3.12"
+        cache: "pip"
+    - run: pip install -r requirements.txt
 
     - name: Install flux
       run: |
@@ -77,10 +69,6 @@ jobs:
         which kind
         kind version
 
-    - name: Install playwright
-      run: |
-        pip install pytest-playwright
-
     - name: Install chromium
       run: |
         playwright install chromium

requirements.txt

@@ -0,0 +1,6 @@
+flake8==7.1.1
+pre_commit==4.1.0
+pytest==8.3.4
+pytest-dotenv==0.5.2
+pytest-playwright==0.6.2
+pytest-reporter-html1==0.9.2