From ce6ae8d511cd4af0b03842f63ecc4e8e7b89367b Mon Sep 17 00:00:00 2001
From: Ciaran Moran <ciaran@weave.works>
Date: Mon, 1 Jun 2020 14:36:15 +0100
Subject: [PATCH] Use multi-stage build to slim image

---
 Dockerfile | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 8f693b77..62788a95 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
-FROM alpine:3.11
+FROM alpine:3.11 as userconf
 
 RUN addgroup -S flagger \
-    && adduser -S -g flagger flagger \
+    && adduser -S -G flagger flagger \
     && apk --no-cache add ca-certificates
 
 WORKDIR /home/flagger
@@ -10,6 +10,14 @@ COPY /bin/flagger .
 
 RUN chown -R flagger:flagger ./
 
+FROM alpine:3.11
+
+RUN addgroup -S flagger \
+    && adduser -S -G flagger flagger \
+    && apk --no-cache add ca-certificates
+
+COPY --from=userconf /home /home
+
 USER flagger
 
 ENTRYPOINT ["./flagger"]