https://github.com/discourse/discourse/blob/master/docs/INSTALL-ubuntu.md 我按照这个流程部署 discourse 后访问页面得到 nginx 502,查看 thin log 得到这样的信息: /var/www/discourse/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.4/lib/active_record/connection_adapters/postgresql_adapter.rb:848:in `initialize': fe_sendauth: no password supplied (PG::Error)