update ci.yaml: test headless PyQt5

Author: JLBegin

.github/workflows/ci.yaml

@@ -51,6 +51,12 @@ jobs:
         run: |
           python -c "from pytissueoptics.rayscattering.opencl import OPENCL_OK; assert OPENCL_OK"
 
+      - name: Test headless PyQt5
+        env:
+          QT_QPA_PLATFORM: offscreen
+        run: |
+          python -c "from PyQt5.QtWidgets import QApplication, QLabel; app = QApplication([]); QLabel('Test');"
+
       - name: Run tests
         env:
           QT_QPA_PLATFORM: offscreen

docker/Dockerfile

@@ -29,12 +29,12 @@ RUN apt-get update && \
 RUN python3 -m venv /opt/venv
 ENV PATH="/opt/venv/bin:$PATH"
 
-RUN pip install --no-cache-dir --upgrade pip setuptools wheel
+RUN pip install --no-cache-dir --upgrade pip setuptools>=40.8.0 wheel pytest
 
 WORKDIR /PyTissueOptics
 RUN git clone https://github.com/DCC-Lab/PyTissueOptics.git . && \
     git checkout jlb/setup-ci && \
-    pip install --no-cache-dir -r requirements.txt
+    pip install --no-cache-dir .
 
 ENV QT_QPA_PLATFORM=offscreen
 ENV PTO_DEVICE_INDEX=0