Merge pull request #2 from hellofresh/patch/dockerfile

Switch Dockerfile base to ubuntu

Dockerfile

@@ -4,15 +4,17 @@ WORKDIR /go/src/github.com/hellofresh/rds_exporter
 COPY . ./
 RUN make
 
-FROM alpine:3.9
+FROM ubuntu:bionic
 
-RUN apk add --no-cache --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \
-    ca-certificates==20190108-r0 \
-    py-boto3==1.9.75-r2 \
-    py-yaml==4.1-r0
+RUN apt-get update -y \
+ && apt-get install -y \
+        ca-certificates \
+        python3-boto3 \
+        python3-yaml \
+ && rm -rf /var/cache/apt/*
 
 COPY --from=builder /go/src/github.com/hellofresh/rds_exporter/rds_exporter /
-COPY entry.py             /
+COPY entry.py /
 
 EXPOSE 9042
 ENTRYPOINT ["/usr/bin/python3", "/entry.py"]