use absolute paths

Dockerfile

@@ -7,7 +7,7 @@ RUN apt-get -q update && env DEBIAN_FRONTEND=noninteractive apt-get install -y -
 # don't need to do bash tricks to keep the layers small, as this is a multi-stage build
 ENV GOPATH=/go
 WORKDIR $GOPATH
-RUN git clone https://github.com/OperatorFoundation/shapeshifter-dispatcher && cd shapeshifter-dispatcher && go build
+RUN git clone https://github.com/OperatorFoundation/shapeshifter-dispatcher /shapeshifter-dispatcher && cd /shapeshifter-dispatcher && go build
 RUN strip /shapeshifter-dispatcher/shapeshifter-dispatcher
 RUN go get -u github.com/kumina/openvpn_exporter
 RUN strip $GOPATH/bin/openvpn_exporter