Added Dockerfile

Signed-off-by: Mathias Kaufmann <me@stei.gr>

.dockerignore

@@ -0,0 +1,7 @@
+**/*
+!.git/
+!*.go
+!GNUmakefile
+!common.mk
+!Dockerfile
+!.dockerignore

Dockerfile

@@ -0,0 +1,17 @@
+FROM golang:1.10 AS goircd-builder
+ARG  PACKAGE=github.com/bbusse/goircd
+ENV  PACKAGE=$PACKAGE
+
+WORKDIR /go/src/github.com/bbusse/goircd/
+
+ADD  . /go/src/github.com/bbusse/goircd/
+
+RUN  export CGO_ENABLED=0 \
+ &&  go get $PACKAGE \
+ &&  make -f GNUmakefile goircd \
+ &&  mv goircd /go/bin/goircd
+
+FROM alpine AS goircd
+COPY --from=goircd-builder /go/bin/goircd /bin/goircd
+ENTRYPOINT ["sh","-c"]
+CMD ["exec goircd"]