Added instructions for installing BETYdb locally using docker per terraref/documentation#153

Author: dlebauer

traits/07-betydb-sql-access.Rmd

@@ -0,0 +1,22 @@
+---
+title: "Accessing Traits w/ PostgreSQL"
+author: "David LeBauer"
+date: "`r Sys.Date()`"
+output: html_document
+---
+
+## On the workbench:
+
+will be derived from https://github.com/pi4-uiuc/2017-bootcamp/blob/master/content/post/2017-05-30-databases-and-sql.Rmd#with
+
+## Installing the database locally 
+
+This is truly an easter egg:
+
+You can run the entire database locally, with daily imports:
+
+```sh
+docker run --name betydb -p 5432:5432 terraref/betydb-postgis
+```
+
+Now it will appear that you have the entire trait database running at localhost on port 5432 just like if it were installed on your system!