From e62dbbda9433022dcfcdd3a0b0851cfe5b280ac8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philipp=20B=C3=B6hm?= <philipp@pboehm.org>
Date: Sun, 21 Feb 2021 14:44:32 +0100
Subject: [PATCH] add new Dockerfile with multi-stage build that produces a
 single binary docker image

---
 .circleci/config.yml |  4 ++--
 Dockerfile           | 17 +++++++++++++++++
 2 files changed, 19 insertions(+), 2 deletions(-)
 create mode 100644 Dockerfile

diff --git a/.circleci/config.yml b/.circleci/config.yml
index e99dff8..dd7b7a2 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -18,7 +18,7 @@ jobs:
       - checkout
       - docker/build:
           image: pboehm/ddns
-          dockerfile: docker/ddns/Dockerfile
+          dockerfile: Dockerfile
 
   docker-build-and-push:
     executor: docker/docker
@@ -28,7 +28,7 @@ jobs:
       - docker/check
       - docker/build:
           image: pboehm/ddns
-          dockerfile: docker/ddns/Dockerfile
+          dockerfile: Dockerfile
           tag: $CIRCLE_SHA1,latest
       - docker/push:
           image: pboehm/ddns
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..744fa3a
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,17 @@
+FROM golang:alpine AS builder
+
+RUN apk add --no-cache git
+
+WORKDIR /go/src/github.com/pboehm/ddns
+COPY . .
+
+RUN GO111MODULE=on go get -d -v ./...
+RUN export CGO_ENABLED=0 && GO111MODULE=on go install -v ./...
+
+ENV GIN_MODE release
+
+FROM scratch
+
+COPY --from=builder /go/bin/ddns /go/bin/ddns
+
+ENTRYPOINT ["/go/bin/ddns"]