update

Dockerfile

@@ -17,12 +17,16 @@ RUN curl -sL https://deb.nodesource.com/setup_12.x | bash - && \
           rsync \
           vim \
           software-properties-common \
+          build-essential \
+          libssl-dev \
+          libffi-dev \
+          python-dev \
+          python3-dev \
     && rm -rf /var/lib/apt/lists/* && \
     curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add - && \
     add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable" && \
     apt-get update && \
-    apt-get install -y docker-ce=17.06.2~ce-0~ubuntu \
-    python-dev && \
+    apt-get install -y docker-ce=17.06.2~ce-0~ubuntu && \
     curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl && \
     chmod +x ./kubectl && \
     mv ./kubectl /usr/local/bin/kubectl && \