server: expose x-request-id in CORS headers

[dirkdev98]

Closes #487

[github-actions]

==== C8 test coverage ====
Statements: 70.2% ( 18375/26174 )
Branches : 71.89% ( 2174 /3024 )
Functions : 70.33% ( 678 /964 )
Lines : 70.2% ( 18375 /26174 )

[github-actions]

==== Benchmark result ====

Node.js version: 14

Total benchmarks: 13
          Passed: 13
          Failed: 0
-----------
lbu validator simple                    5000000  iterations      449  ns/op
yup validator simple                      20000  iterations    59750  ns/op
fastest-validator validator simple     10000000  iterations      135  ns/op
lbu validator nested                      50000  iterations    49217  ns/op
yup validator nested                       5000  iterations   397326  ns/op
fastest-validator validator nested      2000000  iterations      829  ns/op
logger - strings                         500000  iterations     2328  ns/op
logger - objects                         500000  iterations     2792  ns/op
logger - deep objects                    500000  iterations     4413  ns/op
uuid                                    2000000  iterations      553  ns/op
uuid.isValid                           10000000  iterations      165  ns/op
isNil                                 500000000  iterations        0  ns/op
isPlainObject                         100000000  iterations       19  ns/op

[github-actions]

==== Benchmark result ====

Node.js version: 15

Total benchmarks: 13
          Passed: 13
          Failed: 0
-----------
lbu validator simple                    5000000  iterations      461  ns/op
yup validator simple                      20000  iterations    61256  ns/op
fastest-validator validator simple     10000000  iterations      135  ns/op
lbu validator nested                      50000  iterations    47389  ns/op
yup validator nested                       5000  iterations   397377  ns/op
fastest-validator validator nested      2000000  iterations      831  ns/op
logger - strings                         500000  iterations     2260  ns/op
logger - objects                         500000  iterations     2734  ns/op
logger - deep objects                    500000  iterations     4262  ns/op
uuid                                    2000000  iterations      586  ns/op
uuid.isValid                           10000000  iterations      161  ns/op
isNil                                 500000000  iterations        0  ns/op
isPlainObject                         100000000  iterations       19  ns/op