use docker build for golang binary

Author: JamesClonk

Dockerfile

@@ -1,3 +1,16 @@
+FROM ubuntu:20.04
+
+ARG package_args='--allow-downgrades --allow-remove-essential --allow-change-held-packages --no-install-recommends'
+RUN echo "debconf debconf/frontend select noninteractive" | debconf-set-selections && \
+  export DEBIAN_FRONTEND=noninteractive && \
+  apt-get -y $package_args update && \
+  apt-get -y $package_args dist-upgrade && \
+  apt-get -y $package_args install curl ca-certificates gnupg tzdata golang git
+
+WORKDIR /go/src/github.com/swisscom/backman
+COPY . .
+RUN go build -o backman
+
 FROM ubuntu:20.04
 LABEL maintainer="JamesClonk <[email protected]>"
 
@@ -29,10 +42,12 @@ RUN useradd -u 2000 -mU -s /bin/bash vcap && \
   chown vcap:vcap /home/vcap/app
 
 WORKDIR /home/vcap/app
-COPY backman ./
+#COPY backman ./
 COPY public ./public/
 COPY static ./static/
+COPY --from=0 /go/src/github.com/swisscom/backman/backman ./backman
 
+RUN chmod +x /home/vcap/app/backman
 RUN chown -R vcap:vcap /home/vcap/app
 USER vcap
 

Makefile

@@ -51,7 +51,7 @@ init:
 
 .PHONY: docker-build
 ## docker-build: builds docker image
-docker-build: clean build
+docker-build: clean
 	docker build -t jamesclonk/${APP}:${COMMIT_SHA} $$PWD
 
 .PHONY: docker-push

manifest.yml

@@ -23,7 +23,7 @@ applications:
 
   # ### push either as docker image
   docker:
-    image: jamesclonk/backman:1.23.0 # choose version from https://hub.docker.com/r/jamesclonk/backman/tags, or 'latest'
+    image: jamesclonk/backman:1.23.1 # choose version from https://hub.docker.com/r/jamesclonk/backman/tags, or 'latest'
   # ### or as buildpack/src
   # buildpacks:
   # - https://github.com/cloudfoundry/apt-buildpack