add public_url option

Dockerfile_test

@@ -0,0 +1,35 @@
+# Run tests inside docker without requiring full installation of dependencies on local machine
+# Simply run "docker build -f Dockerfile_test ."
+# WARNING: sometimes it fails with a core dumped exception
+
+FROM node:6-stretch
+MAINTAINER Petr Sloup <petr.sloup@klokantech.com>
+
+RUN apt-get -qq update \
+&& DEBIAN_FRONTEND=noninteractive apt-get -y install \
+    apt-transport-https \
+    curl \
+    unzip \
+    build-essential \
+    python \
+    libcairo2-dev \
+    libgles2-mesa-dev \
+    libgbm-dev \
+    libllvm3.9 \
+    libprotobuf-dev \
+    libxxf86vm-dev \
+    xvfb \
+&& apt-get clean
+
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+
+RUN wget -O test_data.zip https://github.com/klokantech/tileserver-gl/releases/download/v1.3.0/test_data.zip
+RUN unzip -q test_data.zip -d test_data
+
+ENV NODE_ENV="test"
+
+COPY package.json .
+RUN npm install
+COPY / .
+RUN xvfb-run --server-args="-screen 0 1024x768x24" npm test