Fix Dockerfile build image

* Use official java:openjdk-8-jdk instead of ubuntu
* Check Android SDK download with sha256
* Remove unzip temp failing

```
unzip:  cannot find or open /usr/local/android-sdk-linux/temp/*.zip,
/usr/local/android-sdk-linux/temp/*.zip.zip or
/usr/local/android-sdk-linux/temp/*.zip.ZIP.
```

// FREEBIE

Dockerfile

@@ -1,25 +1,38 @@
-FROM ubuntu:17.04
+FROM openjdk:8-jdk
 
-RUN dpkg --add-architecture i386 && \
-    apt-get update -y && \
-    apt-get install -y software-properties-common && \
-    apt-get update -y && \
-    apt-get install -y libc6:i386=2.24-9ubuntu2.2 libncurses5:i386=6.0+20160625-1ubuntu1 libstdc++6:i386=6.3.0-12ubuntu2 lib32z1=1:1.2.11.dfsg-0ubuntu1 wget openjdk-8-jdk=8u131-b11-2ubuntu1.17.04.3 git unzip && \
-    rm -rf /var/lib/apt/lists/* && \
-    apt-get autoremove -y && \
-    apt-get clean
+ENV DEBIAN_FRONTEND=noninteractive \
+    DEBIAN_PRIORITY=critical \
+    DEBCONF_NOWARNINGS=yes
+
+RUN set -ex \
+        && dpkg --add-architecture i386 \
+        && apt-get update -qqy \
+        && apt-get -qqy --no-install-recommends install \
+            software-properties-common \
+            libc6:i386=2.24-11+deb9u1 \
+            libncurses5:i386=6.0+20161126-1+deb9u1 \
+            libstdc++6:i386=6.3.0-18+deb9u1 \
+            lib32z1=1:1.2.8.dfsg-5 \
+            wget git unzip \
+        && apt-get purge -y \
+        && apt-get autoremove -y \
+        && apt-get clean \
+        && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
 ENV ANDROID_SDK_FILENAME android-sdk_r24.4.1-linux.tgz
+ENV ANDROID_SDK_SHA256 e16917ad685c1563ccbc5dd782930ee1a700a1b6a6fd3e44b83ac694650435e9
 ENV ANDROID_SDK_URL https://dl.google.com/android/${ANDROID_SDK_FILENAME}
 ENV ANDROID_API_LEVELS android-27
 ENV ANDROID_BUILD_TOOLS_VERSION 27.0.1
 ENV ANDROID_HOME /usr/local/android-sdk-linux
 ENV PATH ${PATH}:${ANDROID_HOME}/tools:${ANDROID_HOME}/platform-tools
-RUN cd /usr/local/ && \
-    wget -q ${ANDROID_SDK_URL} && \
-    tar -xzf ${ANDROID_SDK_FILENAME} && \
-    rm ${ANDROID_SDK_FILENAME} 
+
+RUN cd /usr/local/ \
+    && wget -q ${ANDROID_SDK_URL} \
+    && echo "${ANDROID_SDK_SHA256} ${ANDROID_SDK_FILENAME}" | sha256sum -c - \
+    && tar -xzf ${ANDROID_SDK_FILENAME} \
+    && rm ${ANDROID_SDK_FILENAME}
 RUN echo y | android update sdk --no-ui -a --filter ${ANDROID_API_LEVELS}
 RUN echo y | android update sdk --no-ui -a --filter extra-android-m2repository,extra-android-support,extra-google-google_play_services,extra-google-m2repository
 RUN echo y | android update sdk --no-ui -a --filter tools,platform-tools,build-tools-${ANDROID_BUILD_TOOLS_VERSION}
-RUN rm -rf ${ANDROID_HOME}/tools && unzip ${ANDROID_HOME}/temp/*.zip -d ${ANDROID_HOME}
+RUN rm -rf ${ANDROID_HOME}/tools