refactor: rename test.py to main.py

Author: umihico

Dockerfile

@@ -13,5 +13,5 @@ RUN yum install atk cups-libs gtk3 libXcomposite alsa-lib \
 RUN pip install selenium
 COPY --from=build /opt/chrome-linux /opt/chrome
 COPY --from=build /opt/chromedriver /opt/
-COPY test.py ./
-CMD [ "test.handler" ]
+COPY main.py ./
+CMD [ "main.handler" ]