add proper instructions

config.lua

@@ -2,6 +2,7 @@ local config = require("lapis.config")
 local secrets = require("secrets")
 
 config({"development", "production"}, {
+  port = 8080,
   server = "nginx",
   code_cache = "off",
   num_workers = "1",
@@ -21,4 +22,5 @@ config("production", {
   sqlite = {
     database = "db.prod.sqlite"
   },
+  session_name = "porom_session_s"
 })