Find missing index in the whole instance

DECLARE @email_profile_name VARCHAR(100);
DECLARE @email_recipients VARCHAR(100);
set @email_profile_name = '<email profile name>' ; 
set @email_recipients = '<email recipients>';

If(OBJECT_ID('tempdb..#TempMissingIndex') Is Not Null)
Begin
    Drop Table #TempMissingIndex
End

create table #TempMissingIndex
(
    index_advantage int, 
    DB_info Varchar(350),
Equality_columns Varchar(350),
    Inequality_columns Varchar(350),
Included_columns Varchar(350)
)

EXEC sp_MSforeachdb '
IF ''?'' NOT IN(''master'',''tempdb'',''msdb'', ''model'')
BEGIN

USE [?];
Insert into #TempmissingIndex
SELECT 
user_seeks * avg_total_user_cost * ( avg_user_impact * 0.01 ) AS [index_advantage] ,
dbmid.[statement] AS [Database.Schema.Table] ,
dbmid.equality_columns ,
dbmid.inequality_columns ,
dbmid.included_columns
FROM sys.dm_db_missing_index_group_stats AS dbmigs WITH ( NOLOCK )
INNER JOIN sys.dm_db_missing_index_groups AS dbmig WITH ( NOLOCK ) ON dbmigs.group_handle = dbmig.index_group_handle
INNER JOIN sys.dm_db_missing_index_details AS dbmid WITH ( NOLOCK ) ON dbmig.index_handle = dbmid.index_handle
WHERE dbmid.[database_id] = DB_ID()
and (user_seeks * avg_total_user_cost * ( avg_user_impact * 0.01 )) > 50000
ORDER BY index_advantage DESC ;
END';

IF EXISTS (SELECT * FROM #TempMissingIndex)
begin

DECLARE @tableHTML  NVARCHAR(MAX);
SET @tableHTML =
    N'<h1>Missing Index</h1>'
  + N'<table border="1">'
  + N'<tr><th>index_advantage</th><th>DB_info</th><th>Equality_columns</th><th>Inequality_columns</th><th>Included_columns</th></tr>'
  + CAST ( 
(  Select 
                   td = [PP].[index_advantage], ''
 , td = [PP].[DB_info], ''
 , td = [PP].[Equality_columns] , ''
 , td = [PP].[Inequality_columns], ''
,  td = [PP].[Included_columns]
FROM #TempMissingIndex PP
FOR XML PATH('tr'), TYPE
) AS NVARCHAR(MAX)
)
  + N'</table>';


EXEC msdb.dbo.sp_send_dbmail
@profile_name =@email_profile_name ,
@recipients = @email_recipients ,
@subject = 'Report',
@body = @tableHTML,
@body_format = 'HTML';

END;
Drop Table #TempMissingIndex