Allow project img to be set and updated.
Allow project img to be set and updated.

- Include a fallback directive and fallback image.

#116

dcallner/project-jellyfish-api,sreekantch/JellyFish,AllenBW/api,projectjellyfish/api,sonejah21/api,dcallner/project-jellyfish-api,mafernando/api,boozallen/projectjellyfish,projectjellyfish/api,AllenBW/api,dcallner/project-jellyfish-api,projectjellyfish/api,adderall/api,boozallen/projectjellyfish,mafernando/api,sonejah21/api,normalfaults/ux,adderall/api,stackus/api,sreekantch/JellyFish,boozallen/projectjellyfish,normalfaults/ux,stackus/api,mafernando/api,sonejah21/api,sreekantch/JellyFish,adderall/api,stackus/api,AllenBW/api,boozallen/projectjellyfish