disable logging in image server

so geo_choropleth-text doesn't barf on its unrecognized locations

Author: alexcjohnson

test/image/index.html

@@ -4,6 +4,9 @@
 <!-- this index file gets copied in to the image server docker -->
 <script type="text/javascript" src="../plotly.js/dist/extras/mathjax/MathJax.js?config=TeX-AMS-MML_SVG"></script>
 <script type="text/javascript" src="../plotly.js/build/plotly.js" charset="utf-8"></script>
+<script type="text/javascript">
+    Plotly.setPlotConfig({logging: 0});
+</script>
 <script type="text/javascript" src="../plotly.js/dist/plotly-geo-assets.js" charset="utf-8"></script>
 <script type="text/javascript" src="./main.js"></script>
 </body>