Add environment variables on front (#87)

client/.env

@@ -0,0 +1 @@
+REACT_APP_REST_SERVER_ADDRESS="http://127.0.0.1:8080"

client/src/README.md

@@ -0,0 +1,15 @@
+# WEB CLIENT for ROOMKN
+
+## Run
+
+`npm run start`
+
+## Build
+
+`npm run build`
+
+Built static files in `./build`
+
+## Environment variables
+
+`REACT_APP_REST_SERVER_ADDRESS`

client/src/api/API.js

@@ -1,8 +1,9 @@
 import { useEffect, useState } from 'react';
 
-const API_HOST = "http://127.0.0.1:8080"
+const API_HOST = process.env.REACT_APP_REST_SERVER_ADDRESS
 
 export function useAPI(url, data=null, method='GET') {
+    console.log(API_HOST)
     const [result, setResult] = useState();
     const [loading, setLoading] = useState(true);
     const [finished, setFinished] = useState(false);