Fix dev-standalone build
bzr is no longer available in Alpine Linux as of 3.12
(https://github.com/alpinelinux/docker-alpine/issues/87).
FROM golang:1.13-alpine as build-base
RUN apk update && apk upgrade && \
- apk add --no-cache bash git openssh make bzr
+ apk add --no-cache bash git openssh make
WORKDIR /workspace
