Add Dockerfile for Travis

Dockerfile

@@ -0,0 +1,20 @@
+FROM selenium/node-chrome:latest
+
+USER root
+
+RUN apt-get update -qqy \
+  && apt-get -qqy install python git build-essential \
+  && rm -rf /var/lib/apt/lists/* /var/cache/apt/* \
+  && rm /bin/sh && ln -s /bin/bash /bin/sh \
+  && chown seluser /usr/local
+
+ENV NVM_DIR /usr/local/nvm
+RUN wget -qO- https://raw.githubusercontent.com/creationix/nvm/v0.33.2/install.sh | bash \
+  && source $NVM_DIR/nvm.sh \
+  && nvm install v8
+
+ENV CHROME_BIN /opt/google/chrome/chrome
+ENV INSIDE_DOCKER=1
+
+WORKDIR /usr/src
+ENTRYPOINT source $NVM_DIR/nvm.sh && npm i && npm test

package.json

@@ -9,7 +9,7 @@
     "start": "webpack serve --host 0.0.0.0 --hot",
     "build": "webpack -p",
     "lint": "eslint src",
-    "test": "mocha -R spec"
+    "test": "npm run build && mocha -R spec"
   },
   "eslintConfig": {
     "extends": [