Use Alpine base image

Dockerfile

@@ -1,16 +1,15 @@
-FROM debian:stable-slim
+FROM alpine:3.6
 MAINTAINER Luke Childs <lukechilds123@gmail.com>
 
 ADD ./bin /usr/local/bin
 
 RUN chmod a+x /usr/local/bin/* && \
-    apt-get update && \
-    apt-get install -y --no-install-recommends curl ca-certificates unzip && \
+    apk add --no-cache curl unzip && \
     curl -L https://github.com/vertcoin/vertcoin/releases/download/v0.11.1.0/vertcoin-v0.11.1.0-linux-64bit.zip --output /tmp/prebuilt.zip && \
     unzip /tmp/prebuilt.zip -d /tmp && \
     mv /tmp/vertcoind /usr/local/bin && \
-    apt-get purge -y curl ca-certificates unzip && \
-    apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+    apk del curl unzip && \
+    rm -rf /tmp/* /var/tmp/*
 
 VOLUME ["/data"]
 ENV HOME /data

bin/init

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 DATA_DIR=/data
 CONF=${DATA_DIR}/vertcoin.conf