feat: add .env support to the node (#336)

Author: rittme

.gitignore

@@ -23,3 +23,6 @@ yarn-error.log
 
 # OS specific files
 .DS_Store
+
+# local environment variables
+.env

packages/request-node/package.json

@@ -42,6 +42,7 @@
     "@requestnetwork/ethereum-storage": "0.1.1-alpha.9",
     "@requestnetwork/types": "0.1.1-alpha.8",
     "cors": "2.8.5",
+    "dotenv": "8.0.0",
     "express": "4.16.4",
     "http-status-codes": "1.3.0",
     "truffle-hdwallet-provider": "1.0.3",

packages/request-node/src/config.ts

@@ -1,6 +1,9 @@
 import { Storage as StorageTypes } from '@requestnetwork/types';
 import { argv } from 'yargs';
 
+// Load environment variables from .env file (without overriding variables already set)
+require('dotenv').config();
+
 /**
  * This contains default values used for the server and storage initialization
  * when environment variable is not specified

yarn.lock

@@ -3104,6 +3104,11 @@ dot@^1.1.1:
   resolved "https://registry.yarnpkg.com/dot/-/dot-1.1.2.tgz#c7377019fc4e550798928b2b9afeb66abfa1f2f9"
   integrity sha1-xzdwGfxOVQeYkosrmv62ar+h8vk=
 
+dotenv@8.0.0:
+  version "8.0.0"
+  resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-8.0.0.tgz#ed310c165b4e8a97bb745b0a9d99c31bda566440"
+  integrity sha512-30xVGqjLjiUOArT4+M5q9sYdvuR4riM6yK9wMcas9Vbp6zZa+ocC9dp6QoftuhTPhFAiLK/0C5Ni2nou/Bk8lg==
+
 drbg.js@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/drbg.js/-/drbg.js-1.0.1.tgz#3e36b6c42b37043823cdbc332d58f31e2445480b"