fill dockerfile with life

Dockerfile

@@ -1,3 +1,14 @@
-FROM alpine
+FROM alpine:3.7 as builder
 
-LABEL maintainer="hanjo@bunix.de"
+LABEL maintainer="hanjo@bunix.de"
+
+RUN apk --no-cache add git && \
+    mkdir /adr && \
+    cd /adr && \
+    git clone https://github.com/npryce/adr-tools.git
+
+FROM alpine:3.7 as release
+
+RUN apk --no-cache add bash
+
+COPY --from=builder /adr/adr-tools/src/. /usr/local/bin/