Change Dockerfile to make it work

Dockerfile

@@ -1,11 +1,10 @@
 FROM python:3-alpine
-WORKDIR /workdir
+WORKDIR /src
 RUN apk add alpine-sdk autoconf automake libtool gcc
 
-ADD requirements.txt /workdir/
-RUN pip3 install -r requirements.txt
+ADD . /src/
+RUN pip3 install .
 
-ADD . /workdir/
 CMD ["python", "-m", "relay"]
 
-VOLUME ["/workdir/data"]
+VOLUME ["/src/data"]