FE+BE: BACKEND_API_URL for reverse proxies #1390

Signed-off-by: jokob-sk <jokob.sk@gmail.com>

front/js/api.js

@@ -0,0 +1,15 @@
+function getApiBase()
+{
+    apiBase = getSetting("BACKEND_API_URL");
+
+    if(apiBase == "")
+    {
+        const protocol = window.location.protocol.replace(':', '');
+        const host = window.location.hostname;
+        const port = getSetting("GRAPHQL_PORT");
+
+        apiBase = `${protocol}://${host}:${port}`;
+    }
+
+    return apiBase;
+}