added dynamic domain

src/constants.js

@@ -0,0 +1,19 @@
+// eslint-disable-next-line no-undef
+const useLocalhost = process && process.env.NODE_ENV === 'development'
+// eslint-disable-next-line no-undef
+const domain = process && process.env.DOMAIN
+
+if (!domain && !useLocalhost) {
+    throw new Error('Domain is not defined! Please set DOMAIN env variable!')
+}
+
+const constants = {
+    domain: domain || 'localhost',
+    siteUrl: useLocalhost ? 'http://localhost:8080/' : `https://${domain}/`,
+    apiUrl: useLocalhost
+        ? 'http://localhost:8080/api/'
+        : `https://${domain}/api/`,
+    maxQuestionsToRender: 250,
+}
+
+export default constants