fix dockerfile

Author: tve

Dockerfile

@@ -9,13 +9,12 @@
 FROM ubuntu:16.04
 
 RUN apt-get update \
- && apt-get install -y software-properties-common build-essential python curl git
+ && apt-get install -y software-properties-common build-essential python curl git \
+                       zlib1g-dev openjdk-8-jre-headless
 
 RUN curl -Ls http://s3.voneicken.com/xtensa-lx106-elf-20160330.tgx | tar Jxf -
 RUN curl -Ls http://s3.voneicken.com/esp_iot_sdk_v2.0.0.p1.tgx | tar -Jxf -
 
-RUN apt-get install zlib1g-dev openjdk-8-jre-headless
-
 ENV XTENSA_TOOLS_ROOT /xtensa-lx106-elf/bin/
 
 # This could be used to create an image with esp-link in it from github: