Update main.yml

Author: tkimhofer

.github/workflows/main.yml

@@ -22,4 +22,11 @@ jobs:
         with:
           python-version: '3.10'
 
-      - name: Install dep
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+
+      - name: Smoke test Dash app
+        run: |
+          python -c "from app import app; assert callable(app.run_server)"