From 3165cd57185ebaa606ab245542fb6a6444d09295 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=A8=D0=B0=D0=BC=D0=B8=D0=BB=D1=8C=20=D0=93=D0=B0=D0=BD?=
 =?UTF-8?q?=D0=B8=D0=B5=D0=B2?= <samolander@yandex.ru>
Date: Tue, 6 Mar 2018 20:29:24 +0300
Subject: [PATCH 1/2] add Dockerfile

---
 Dockerfile | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 Dockerfile

diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..c067c74
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,20 @@
+FROM ubuntu
+MAINTAINER Shamil Ganiev <samolander@yandex.ru>
+
+RUN apt-get update -qqy && \
+    apt-get install --no-install-recommends -qqy lsb-release && \
+    \
+    # Install OptiPNG
+    echo "deb http://archive.ubuntu.com/ubuntu $(lsb_release -sc) main universe" > /etc/apt/sources.list && \
+    apt-get remove --purge -y lsb-release $(apt-mark showauto) && \
+    apt-get update -qqy && \
+    apt-get install -qqy --no-install-recommends optipng && \
+    \
+    # cleanup
+    apt-get autoremove -y && \
+    apt-get clean -y && \
+    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+WORKDIR /srv
+
+CMD [ "/usr/bin/optipng", "-quiet", "-o7", "*.png" ]
\ No newline at end of file

From cf4be5b560d92063a6a52424957b75f9326fdaca Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=A8=D0=B0=D0=BC=D0=B8=D0=BB=D1=8C=20=D0=93=D0=B0=D0=BD?=
 =?UTF-8?q?=D0=B8=D0=B5=D0=B2?= <samolander@yandex.ru>
Date: Tue, 6 Mar 2018 21:10:03 +0300
Subject: [PATCH 2/2] add cmd.sh

---
 Dockerfile | 23 +++++++----------------
 cmd.sh     | 11 +++++++++++
 2 files changed, 18 insertions(+), 16 deletions(-)
 create mode 100755 cmd.sh

diff --git a/Dockerfile b/Dockerfile
index c067c74..12ea4f0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,20 +1,11 @@
-FROM ubuntu
+FROM alpine
 MAINTAINER Shamil Ganiev <samolander@yandex.ru>
 
-RUN apt-get update -qqy && \
-    apt-get install --no-install-recommends -qqy lsb-release && \
-    \
-    # Install OptiPNG
-    echo "deb http://archive.ubuntu.com/ubuntu $(lsb_release -sc) main universe" > /etc/apt/sources.list && \
-    apt-get remove --purge -y lsb-release $(apt-mark showauto) && \
-    apt-get update -qqy && \
-    apt-get install -qqy --no-install-recommends optipng && \
-    \
-    # cleanup
-    apt-get autoremove -y && \
-    apt-get clean -y && \
-    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
-
 WORKDIR /srv
 
-CMD [ "/usr/bin/optipng", "-quiet", "-o7", "*.png" ]
\ No newline at end of file
+COPY cmd.sh /usr/bin
+
+RUN apk add --no-cache optipng bash git \
+    && echo 'PS1="\[\e[1;32m\][\u@\h \[\e[1;34m\]\W \[\e[1;32m\]]\[\033[00m\] "' > /root/.bashrc 
+
+CMD [ "cmd.sh" ]
diff --git a/cmd.sh b/cmd.sh
new file mode 100755
index 0000000..c9483e2
--- /dev/null
+++ b/cmd.sh
@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+modified_files=`git diff --cached --name-only | grep .png`
+current_dir=`pwd`
+echo $modified_files
+if [ -z "$modified_files" ];then
+  exit 0
+else
+  for i in ${modified_files}; do optipng -o7 -quiet  ${i}; done
+fi
+