Revert to configuring our own environment

.github/workflows/ci.yml

@@ -11,24 +11,25 @@ on:
 jobs:
   test:
     runs-on: ubuntu-latest
-    container:
-      image: qgis/qgis:ltr
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
+
+      - name: Set up QGIS environment 
+        run: |
+          sudo apt update
+          sudo apt install -y qgis python3-qgis python3-pyqt5 python3-pytest
       
       - name: Set Environment Variables
         run: |
           echo "QGIS_HOME=/usr" >> $GITHUB_ENV
-          echo "PYTHONPATH=$QGIS_HOME/share/qgis/python" >> $GITHUB_ENV
-          echo "LD_LIBRARY_PATH=$QGIS_HOME/lib:$LD_LIBRARY_PATH" >> $GITHUB_ENV
           echo "QT_QPA_PLATFORM=offscreen" >> $GITHUB_ENV
           echo "DISPLAY=:99" >> $GITHUB_ENV
 
       - name: Start Virtual Display
         run: Xvfb :99 -screen 0 1024x768x24 &
 
-      - name: Configure Earth Engine Credentials # TODO: add secret to github
+      - name: Configure Earth Engine Credentials 
         run: |
           mkdir -p ~/.config/earthengine  
           echo '${{ secrets.EE_CREDENTIALS_JSON }}' > ~/.config/earthengine/credentials