Update pull-request.yml

Author: tschaume

.github/workflows/pull-request.yml

@@ -10,6 +10,9 @@ on:
     branches:
       - main
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -34,7 +37,8 @@ jobs:
           python${{ matrix.python-version }} -m pip install --upgrade pip packaging wheel
           python${{ matrix.python-version }} -m pip install `grep numpy== requirements/ubuntu-latest_py${{ matrix.python-version }}_extras.txt`
           python${{ matrix.python-version }} -m pip install -r requirements/ubuntu-latest_py${{ matrix.python-version }}_extras.txt
-          python${{ matrix.python-version }} -m pip install --no-deps .
+          python${{ matrix.python-version }} -m pip install --upgrade pip
+          python${{ matrix.python-version }} -m pip install --no-deps .[server]
       - name: Test modules
         run: python${{ matrix.python-version }} -m pytest tests
       - name: Test example apps