Making watch directory configurable

Dockerfile

@@ -1,8 +1,8 @@
 FROM python:3
 
-ADD converter.py /
+ADD converter.py /app/
 
-RUN pip install OfxParser
+RUN pip install ofxparse
 RUN pip install watchdog
 
-CMD [ "python", "./converter.py" ]
+CMD [ "python", "./app/converter.py" ]