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/templates/base.html

@@ -295,6 +295,7 @@
     <script type="text/javascript">
       const themes = {{ LNBITS_THEME_OPTIONS | tojson }}
       const LNBITS_DENOMINATION = {{ LNBITS_DENOMINATION | tojson }}
+      const LNBITS_VERSION = {{ LNBITS_VERSION | tojson }}
       if (themes && themes.length) {
         window.allowedThemes = themes.map(str => str.trim())
       }