Create virtual env

.github/workflows/automatic_local_testing.yml

@@ -21,14 +21,23 @@ jobs:
 
     runs-on: self-hosted
     steps:
+    - name: Clean current working directory
+      run: |
+        pwd
+        rm -rf .
     - uses: actions/checkout@v2
-    - name: Activate virtual env
+    - name: Create and activate virtual env
       run: |
-        source _work/runner-env/bin/activate
+        pwd
+        python3 -m venv runner-env
+        source runner-env/bin/activate
     - name: Install simpa
       run: |
         python -m pip install --upgrade pip
         python -m pip install .
     - name: Testing
       run: |
-        python simpa_examples/optical_and_acoustic_simulation.py
+        python simpa_examples/optical_and_acoustic_simulation.py
+    - name: Deactivate virtual env
+      run: |
+        deactivate