chore: Update the DockerCoin images since old one didn't work

dockercoins/hasher/Dockerfile

@@ -1,6 +1,6 @@
 FROM ruby:alpine
 RUN apk add --update build-base curl
-RUN gem install sinatra
+RUN gem install sinatra -v 3.1.0
 RUN gem install thin
 ADD hasher.rb /
 CMD ["ruby", "hasher.rb"]

dockercoins/webui/Dockerfile

@@ -1,7 +1,8 @@
-FROM node:4-slim
+FROM node:23-slim
+WORKDIR /app
 RUN npm install express
 RUN npm install redis
-COPY files/ /files/
-COPY webui.js /
+COPY files/ files/
+COPY webui.js .
 CMD ["node", "webui.js"]
 EXPOSE 80

dockercoins/webui/webui.js

@@ -2,7 +2,10 @@ var express = require('express');
 var app = express();
 var redis = require('redis');
 
-var client = redis.createClient(6379, 'redis');
+var client = redis.createClient({
+  url: 'redis://redis:6379'
+});
+
 client.on("error", function (err) {
     console.error("Redis error", err);
 });
@@ -12,21 +15,26 @@ app.get('/', function (req, res) {
 });
 
 app.get('/json', function (req, res) {
-    client.hlen('wallet', function (err, coins) {
-        client.get('hashes', function (err, hashes) {
-            var now = Date.now() / 1000;
-            res.json( {
-                coins: coins,
-                hashes: hashes,
-                now: now
-            });
+    client.hLen('wallet').then(coins => {
+      client.get('hashes').then(
+        hashes =>
+        {
+          var now = Date.now() / 1000;
+          res.json({
+              coins: coins,
+              hashes: hashes,
+              now: now
+          });
         });
     });
 });
 
 app.use(express.static('files'));
 
-var server = app.listen(80, function () {
+
+client.connect().then(() => {
+  var server = app.listen(80, function () {
     console.log('WEBUI running on port 80');
+  });
 });