diff --git a/Dockerfile b/Dockerfile
index b4c1c2f..1a4623c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,6 +2,29 @@ FROM jwilder/nginx-proxy
 
 MAINTAINER [ "Jason Wilder <mail@jasonwilder.com>", "Yves Blusseau <90z7oey02@sneakemail.com>" ]
 
-COPY . /app/
+RUN apt-get update
 
-RUN chmod +rx /app/build.sh && /app/build.sh && rm -f /app/build.sh
+# Install python packages needed by simp_le
+RUN apt-get install -y -q --no-install-recommends python python-requests
+
+# Install python packages needed to build  simp_le
+RUN apt-get install -y -q --no-install-recommends git gcc libssl-dev libffi-dev python-dev python-pip
+
+# Get Let's Encrypt simp_le client source
+RUN git -C /opt clone https://github.com/kuba/simp_le.git
+
+WORKDIR /opt/simp_le
+# Upgrade setuptools
+RUN pip install -U setuptools
+# Install simp_le in /usr/local/bin
+RUN python ./setup.py install
+
+# Make house cleaning
+RUN rm -rf /opt/simp_le
+
+RUN -get autoremove -y git gcc libssl-dev libffi-dev python-dev python-pip
+
+RUN apt-get clean all
+RUN rm -r /var/lib/apt/lists/*
+
+COPY . /app/
diff --git a/build.sh b/build.sh
deleted file mode 100755
index 194e16f..0000000
--- a/build.sh
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/bin/bash
-
-set -e
-
-apt-get update
-
-# Install python packages needed by simp_le
-apt-get install -y -q --no-install-recommends python python-requests
-
-# Install python packages needed to build  simp_le
-apt-get install -y -q --no-install-recommends git gcc libssl-dev libffi-dev python-dev python-pip
-
-# Get Let's Encrypt simp_le client source
-git -C /opt clone https://github.com/kuba/simp_le.git
-
-cd /opt/simp_le
-# Upgrade setuptools
-pip install -U setuptools
-# Install simp_le in /usr/local/bin
-python ./setup.py install
-
-# Make house cleaning
-rm -rf /opt/simp_le
-
-apt-get autoremove -y git gcc libssl-dev libffi-dev python-dev python-pip
-
-apt-get clean all
-rm -r /var/lib/apt/lists/*