Compile device-manager statically and use scratch base image

Signed-off-by: Alexandre Peixoto Ferreira <[email protected]>

Author: alexandref75

Dockerfile

@@ -10,15 +10,13 @@ COPY . .
 
 RUN echo $PATH;export CGO_LDFLAGS_ALLOW='-Wl,--unresolved-symbols=ignore-in-object-files' && \
     go mod init arm.com/smarter-device-management && go mod tidy && go mod vendor && \
-    go build -ldflags="-s -w" .
+    CGO_ENABLED=0 go build -ldflags='-s -w -extldflags="-static"' .
 
-FROM alpine
-
-RUN apk update && apk upgrade
+FROM scratch
 
 WORKDIR /root
 
 COPY conf.yaml /root/config/conf.yaml
 COPY --from=build /arm.com/smarter-device-management/smarter-device-management /usr/bin/smarter-device-management
 
-CMD ["smarter-device-management","-logtostderr=true","-v=0"]
+CMD ["/usr/bin/smarter-device-management","-logtostderr=true","-v=0"]