Update web/search for DB constant

lib/search.rb

 require 'sequel'
 
-require_relative '../db/connect'
-
 def search(params)
-  db = connect
   query = params[:q].strip
   offset = (params[:page] - 1) * 10
   username = params[:username].strip
       else
         'created_at DESC'
       end
-    search_threads(db, query, username, sort, offset)
+    search_threads(query, username, sort, offset)
   when 'posts'
-    search_posts(db, query, username, offset)
+    search_posts(query, username, offset)
   else
     Array.new
   end
 end
 
-def search_threads(db, query, username, sort, offset)
-  db[<<-SQL, query, username, username, offset]
+def search_threads(query, username, sort, offset)
+  DB[<<-SQL, query, username, username, offset]
     SELECT
       threads.*
     FROM threads
   SQL
 end
 
-def search_posts(db, query, username, offset)
-  db[<<-SQL, query, username, username, offset]
+def search_posts(query, username, offset)
+  DB[<<-SQL, query, username, username, offset]
     SELECT
       posts.*,
       threads.title as thread_title,

web/server.rb

 require 'sequel'
 require 'sinatra'
 
+require_relative '../db/connect'
 require_relative '../lib/auth'
 require_relative '../lib/search'