Using and showing always local time

routes/api.js
   - console.log deleted

public/javascripts/global.js
   - made 'params' to const
   - added setNoUTC in main

public/javascripts/showcharts.js
   - added setNiUTC to set global at highcharts

package.json
   - added luxon
     "version": "3.0.4",
     "date": "2023-04-24 18:00 UTC",

public/javascripts/showcharts.js

@@ -19,7 +19,7 @@ export async function showChart(params, typ, container) {
     function form() {
         for (let item of tabtable) {
             if (item.type === typ) {
-                const d = DateTime.fromMillis(this.x, {zone: 'utc'})
+                const d = DateTime.fromMillis(this.x)
                 const d1 = d.plus({days: 1})
                 let fmt = d.toFormat(item.dformat)
                 if (((typ === 'daynight') && (this.series.name.startsWith('N'))) || (typ === 'lden')) {
@@ -112,3 +112,11 @@ export const loadAll = async (params, start = 2) => {
         }
     }
 }
+
+export const setNoUTC = () => {
+    Highcharts.setOptions({
+        global: {
+            useUTC: false                                   // Don't use UTC on the charts
+        }
+    });
+}