i couldn't make railway be with php 7.4

Question

Deprecated: Constant FILTER_SANITIZE_STRING is deprecated in /app/index.php on line 19

Deprecated: Constant FILTER_SANITIZE_STRING is deprecated in /app/index.php on line 19

Deprecated: Constant FILTER_SANITIZE_STRING is deprecated in /app/index.php on line 19

Deprecated: Constant FILTER_SANITIZE_STRING is deprecated in /app/index.php on line 19

Deprecated: pg_escape_string(): Automatic fetching of PostgreSQL connection is deprecated in /app/index.php on line 61

Warning: Cannot modify header information - headers already sent by (output started at /app/index.php:19) in /app/index.php on line 1001

Warning: Cannot modify header information - headers already sent by (output started at /app/index.php:19) in /app/index.php on line 1002

Warning: Cannot modify header information - headers already sent by (output started at /app/index.php:19) in /app/index.php on line 1003

Warning: Cannot modify header information - headers already sent by (output started at /app/index.php:19) in /app/index.php on line 1004

Warning: Cannot modify header information - headers already sent by (output started at /app/index.php:19) in /app/index.php on line 1005

Warning: Cannot modify header information - headers already sent by (output started at /app/index.php:19) in /app/index.php on line 1006

Warning: Cannot modify header information - headers already sent by (output started at /app/index.php:19) in /app/index.php on line 1007

Warning: Cannot modify header information - headers already sent by (output started at /app/index.php:19) in /app/index.php on line 1008

Warning: Cannot modify header information - headers already sent by (output started at /app/index.php:19) in /app/index.php on line 1009
these errors appreat