feat: convert from using dst offsets to use timezone code

feat: select timezones from current selected country

lib/logs.js

@@ -1,5 +1,6 @@
 const _ = require('lodash/fp')
-const moment = require('moment')
+const { format } = require('date-fns')
+const { zonedTimeToUtc, utcToZonedTime } = require('date-fns-tz')
 
 const db = require('./db')
 const pgp = require('pg-promise')()
@@ -112,10 +113,13 @@ function simpleGetMachineLogs (deviceId, from = new Date(0).toISOString(), until
 }
 
 function logDateFormat (timezone, logs, fields) {
-  const offset = timezone.split(':')[1]
 
   return _.map(log => {
-    const values = _.map(field => moment.utc(log[field]).utcOffset(parseInt(offset)).format('YYYY-MM-DDTHH:mm:ss.SSS'), fields)
+    const values = _.map(
+      field =>
+        format(utcToZonedTime(zonedTimeToUtc(log[field], process.env.TZ), timezone), 'yyyy-MM-ddTHH:mm:ss.SSS'),
+        fields
+      )
     const fieldsToOverride = _.zipObject(fields, values)
 
     return {