Adds security tools, such as a rate limiter, IP block/allow, server logs (#1606)

* added ratelimiter
* Adds server logs to admin ui
* Added IP allow/ban list
* fixed remove ips
* Split rate limit number and unit
* security tab and background tasks for killswitch
* fix test for auditor api

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Co-authored-by: dni ⚡ <office@dnilabs.com>

lnbits/static/js/base.js

@@ -241,6 +241,15 @@ window.LNbits = {
         }
       })
     },
+    digestMessage: async function (message) {
+      const msgUint8 = new TextEncoder().encode(message)
+      const hashBuffer = await crypto.subtle.digest('SHA-256', msgUint8)
+      const hashArray = Array.from(new Uint8Array(hashBuffer))
+      const hashHex = hashArray
+        .map(b => b.toString(16).padStart(2, '0'))
+        .join('')
+      return hashHex
+    },
     formatCurrency: function (value, currency) {
       return new Intl.NumberFormat(window.LOCALE, {
         style: 'currency',