You can choose redis or memcached cache store, see
https://github.com/sharetribe/sharetribe/blob/master/config/environments/staging.rb#L60
For redis you should add ENV vars like:
redis_host=localhost
redis_port=6379
redis_db=0
As default sharetribe config is for Memcachier servers like for apps on Heroku, for using local memcached server you can simplify config line:
config.cache_store = :dalli_store, 'localhost:11211'