Add ADR for domain layout
Add ADR for domain layout

In addition to describing the domain layout, this ADR discusses
technologies chosen for the landing page and blog.

raster-foundry/raster-foundry,azavea/raster-foundry,aaronxsu/raster-foundry,azavea/raster-foundry,raster-foundry/raster-foundry,aaronxsu/raster-foundry,aaronxsu/raster-foundry,azavea/raster-foundry,aaronxsu/raster-foundry,azavea/raster-foundry,raster-foundry/raster-foundry,azavea/raster-foundry