fix(fallback for env variables): added fallback when there is error with env

src/constants/api.ts

-export const BASE_API_URL = process.env.NEXT_PUBLIC_BASE_API_URL;
\ No newline at end of file
+export const BASE_API_URL = process.env.NEXT_PUBLIC_BASE_API_URL || '';

src/constants/mapId.ts

-export const PROJECT_ID = process.env.NEXT_PUBLIC_PROJECT_ID;
+export const PROJECT_ID = process.env.NEXT_PUBLIC_PROJECT_ID || '';