env: readable environment variables in all files

apiPort -> API_PORT
apiURL -> API_URL
apiName -> API_NAME
cors -> ENABLE_CORS
cookiePath -> COOKIE_PATH

webPort -> WEB_PORT
webURL -> WEB_URL
showSponsors -> SHOW_SPONSORS
isBeta -> IS_BETA

src/modules/stream/manage.js

@@ -43,7 +43,7 @@ export function createStream(obj) {
         exp = streamInfo.exp;
         ghmac = streamInfo.hmac;
     }
-    return `${process.env.apiURL}api/stream?t=${streamID}&e=${exp}&h=${ghmac}`;
+    return `${process.env.API_URL}api/stream?t=${streamID}&e=${exp}&h=${ghmac}`;
 }
 
 export function verifyStream(id, hmac, exp) {