fix: fix github CI python build setup.

.github/workflows/node.js.yml

@@ -34,29 +34,6 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
 
-    - name: Cache node_modules
-      id: cache-node_modules
-      uses: actions/cache@v4
-      with:
-        path: node_modules
-        key: node_modules-${{ hashFiles('package.json', 'package-lock.json') }}
-
-    - name: Cache ~/.elm
-      # see https://docs.microsoft.com/en-us/answers/questions/510640/deploy-elm-app-to-azure-static-website-from-github.html
-      uses: actions/cache@v4
-      with:
-        path: ~/.elm
-        key: elm-cache-${{ hashFiles('elm.json') }}
-        restore-keys: elm-cache-
-
-    - name: Cache pipenv virtualenv
-      uses: actions/cache@v4
-      with:
-        path: ~/.local/share/virtualenvs
-        key: ${{ runner.os }}-${{ matrix.python-version }}-pipenv-${{ hashFiles('Pipfile.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-pipenv-
-
     - name: Install Node dependencies
       run: npm ci --prefer-offline --no-audit
 
@@ -102,3 +79,26 @@ jobs:
 
     - name: Run server tests
       run: pipenv run backend/update.sh && npm run test:server-ci && npm run test:backend
+
+    - name: Cache node_modules
+      id: cache-node_modules
+      uses: actions/cache@v4
+      with:
+        path: node_modules
+        key: node_modules-${{ hashFiles('package.json', 'package-lock.json') }}
+
+    - name: Cache ~/.elm
+      # see https://docs.microsoft.com/en-us/answers/questions/510640/deploy-elm-app-to-azure-static-website-from-github.html
+      uses: actions/cache@v4
+      with:
+        path: ~/.elm
+        key: elm-cache-${{ hashFiles('elm.json') }}
+        restore-keys: elm-cache-
+
+    - name: Cache pipenv virtualenv
+      uses: actions/cache@v4
+      with:
+        path: ~/.local/share/virtualenvs
+        key: ${{ runner.os }}-${{ matrix.python-version }}-pipenv-${{ hashFiles('Pipfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-pipenv-