Parse JSON

parsejson.nim

import json, tables, osproc, strutils

type Services = JsonNode

proc readConfig(): Services =
    result = parseFile("services.json")

when isMainModule:
  var services: Services = readConfig()
  
  for serviceName, serviceNode in services.getFields():
    echo serviceName
    for envName, envValue in serviceNode.getFields():
      echo envName, " ", envValue
  
  let runCmd: array[3, string] = ["docker run -it", "ubuntu", "/bin/bash"]
  let _ = execCmd(runCmd.join(" "))

services.json

{
  "demo": {
    "PORT": 3001
  },
  "chat": {
    "PORT": 3002
  }
}