add openssh for git clone and jdk for java user

Author: vangie

Dockerfile

@@ -1,11 +1,11 @@
-FROM java:8-jre-alpine
+FROM java:8-jdk-alpine
 
 EXPOSE 8080
 
 RUN set -ex && \
     if [ $(wget -qO- ipinfo.io/country) == CN ]; then echo "http://mirrors.aliyun.com/alpine/latest-stable/main/" > /etc/apk/repositories ;fi && \
     apk update && \
-    apk add --no-cache zsh git
+    apk add --no-cache zsh git openssh
 
 # Install oh-my-zsh
 RUN git clone --depth=1 git://github.com/robbyrussell/oh-my-zsh.git ~/.oh-my-zsh \