Fix requirements.txt location in Dockerfile

Dockerfile

@@ -20,6 +20,6 @@ RUN apk --no-cache add \
   python3-dev \
   rsync
 
-COPY ./test/requirements.txt /requirements.txt
+COPY ./requirements.txt /requirements.txt
 RUN pip3 install -r /requirements.txt
 RUN ln -s /usr/bin/python3 /usr/bin/python