introduce the runway definitions

src/airport/dto/runway.dto.ts

@@ -0,0 +1,18 @@
+import { IsNotEmpty } from 'class-validator';
+import { ApiProperty } from '@nestjs/swagger';
+import { CoordinateDto } from '../../generic/dto/coordinate.dto';
+
+export class RunwayDto {
+  @IsNotEmpty()
+  @ApiProperty({
+    description: 'The identifier of the runway',
+    example: '25L',
+  })
+  identifier: string;
+
+  @IsNotEmpty()
+  @ApiProperty({
+    description: 'The runway threshold',
+  })
+  altitude: CoordinateDto;
+}