Made it working from one docker-compose file

Homepage/Dockerfile

@@ -5,4 +5,6 @@ COPY ./index.html /usr/share/nginx/html
 COPY ./logo.png /usr/share/nginx/html
 COPY ./styles.css /usr/share/nginx/html
 COPY ./common.css /usr/share/nginx/html
-COPY ./favicon.ico /usr/share/nginx/html
+COPY ./favicon.ico /usr/share/nginx/html
+
+EXPOSE 80

Homepage/Frontend/scripts.js

@@ -105,8 +105,8 @@ function performRequest(text, checkXML, checkTransform){
 //Form REST request, send, receive and display in resultArea
 async function restRequest(text) {
     const escapeChar = "specialEscapeChar";
-    // const addr = "http://localhost:8081/" + text;
-    const addr = "http://gordon.zipper.release11.com:8081/" + text;
+    const addr = "http://localhost:8081/" + text;
+    // const addr = "http://gordon.zipper.release11.com:8081/" + text;
     
     var xmlData = document.getElementById("xmlArea").value.trim();
     var transformData = document.getElementById("transformArea").value.trim();
@@ -153,4 +153,4 @@ async function restRequest(text) {
         });
 
     });
-}
+}