Try to fix pipeline

.woodpecker/pipeline.yml

@@ -17,6 +17,10 @@ pipeline:
   test_api:
     image: python
     commands:
+      - export MYSQL_USER=aktienbot
+      - export MYSQL_PASSWORD=12345678
+      - export MYSQL_HOST=mariadb
+      - export MYSQL_PORT=3306
       - cd api/
       - pip install -r requirements.txt
       - python -m pytest