fix: dockerfile for 0.8.1 release

Author: garethgeorge

Dockerfile

@@ -1,10 +1,8 @@
 FROM golang:alpine as gobuild
 RUN mkdir /tmp-orig
 COPY backrest /backrest
-RUN /backrest --install-deps=true 
 
 FROM scratch 
-COPY --from=gobuild /root/.local/share/backrest/ /.local/share/backrest/
 COPY --from=gobuild /tmp-orig /tmp
 COPY --from=gobuild /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/