Merge pull request #1983 from kaedroho/drone-images

Added Drone Dockerfiles to /scripts

scripts/drone-images/flake8/Dockerfile

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+FROM python:3.4
+
+RUN pip3.4 install flake8

scripts/drone-images/jscs/Dockerfile

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+FROM node:0.12
+
+RUN npm install -g jscs

scripts/drone-images/readme.md

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+Wagtail CI base images
+======================
+
+This directory contains Dockerfiles for building the base images used by
+Wagtail's continuous integration server.

scripts/drone-images/scss-lint/Dockerfile

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+FROM ruby:2.2
+
+ADD gen_locale.sh /gen_locale.sh
+RUN bash /gen_locale.sh
+ENV LANG=en_GB.UTF-8
+
+# Install scss-lint
+RUN gem install scss-lint

scripts/drone-images/scss-lint/gen_locale.sh

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+apt-get update \
+    && apt-get install -y locales \
+    && rm -rf /var/lib/apt/lists/* \
+
+echo "en_GB.UTF-8 UTF-8" >> /etc/locale.gen
+
+locale-gen