Heroku configuration

client/package.json

@@ -2,6 +2,7 @@
   "name": "client",
   "version": "0.1.0",
   "private": true,
+  "proxy": "http://localhost:3001",
   "dependencies": {
     "react": "^16.8.6",
     "react-dom": "^16.8.6",

client/yarn.lock

@@ -7846,7 +7846,7 @@ react-dev-utils@^9.0.1:
     strip-ansi "5.2.0"
     text-table "0.2.0"
 
-react-dom@16.8.6:
+react-dom@^16.8.6:
   version "16.8.6"
   resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-16.8.6.tgz#71d6303f631e8b0097f56165ef608f051ff6e10f"
   integrity sha512-1nL7PIq9LTL3fthPqwkvr2zY7phIPjYrT0jp4HjyEQrEROnw4dG41VVwi/wfoCneoleqrNX7iAD+pXebJZwrwA==
@@ -7926,7 +7926,7 @@ react-scripts@3.0.1:
   optionalDependencies:
     fsevents "2.0.6"
 
-react@16.8.6:
+react@^16.8.6:
   version "16.8.6"
   resolved "https://registry.yarnpkg.com/react/-/react-16.8.6.tgz#ad6c3a9614fd3a4e9ef51117f54d888da01f2bbe"
   integrity sha512-pC0uMkhLaHm11ZSJULfOBqV4tIZkx87ZLvbbQYunNixAAvjnC+snJCg0XQXn9VIsttVsbZP/H/ewzgsd5fxKXw==