SYMBOL INDEX (4 symbols across 2 files)

FILE: index.js
  constant PORT (line 7) | const PORT = process.env.PORT || 5000

FILE: routes/index.js
  constant API_BASE_URL (line 8) | const API_BASE_URL = process.env.API_BASE_URL
  constant API_KEY_NAME (line 9) | const API_KEY_NAME = process.env.API_KEY_NAME
  constant API_KEY_VALUE (line 10) | const API_KEY_VALUE = process.env.API_KEY_VALUE