Combine Docker setup and Woodpecker agent start in one step

.woodpecker.yml

@@ -1,9 +1,12 @@
 steps:
-  - name: setup_and_start_agent
+  - name: test
     image: ubuntu
     commands:
-      - echo "Spuštění Woodpecker agenta"
+      - echo "Starting tests"
+      - ls -la
+      - echo "Running tests"
       - ./start_woodpecker_agent.sh
+      - echo "Tests complete"
     when:
       branch:
         - master