Link container to source repo

Author: the-maldridge

Dockerfile

@@ -5,5 +5,6 @@ RUN go mod vendor && \
         CGO_ENABLED=0 GOOS=linux go build -a -ldflags '-extldflags "-static"' -o /ldapd .
 
 FROM scratch
+LABEL org.opencontainers.image.source https://github.com/netauth/ldap
 ENTRYPOINT ["/ldapd"]
 COPY --from=build /ldapd /ldapd