refactor: Proxy and cache avatar images (#907)

* refactor: proxy and cache user avatar images

* fix: extract keys

* fix: set avatar image URL

* fix: show the correct avatar in the list of available users in advanced request

* fix(s): set correct src URL for cached image

* fix: remove unexpired unused image when a user changes their avatar

* fix: requested changes

* refactor: use 'mime' package to detmerine file extension

* style: grammar

* refactor: checks if the default avatar is cached to avoid creating duplicates for different users

* fix: fix vulnerability

* fix: fix incomplete URL substring sanitization

* refactor: only cache avatar with http url protocol

* fix: remove log and correctly set the if statement for the cached image component

* fix: avatar images not showing on issues page

* style: formatting

---------

Co-authored-by: JoaquinOlivero <joaquin.olivero@hotmail.com>

src/components/Layout/UserDropdown/index.tsx

@@ -1,3 +1,4 @@
+import CachedImage from '@app/components/Common/CachedImage';
 import MiniQuotaDisplay from '@app/components/Layout/UserDropdown/MiniQuotaDisplay';
 import { useUser } from '@app/hooks/useUser';
 import defineMessages from '@app/utils/defineMessages';
@@ -7,7 +8,6 @@ import {
   ClockIcon,
 } from '@heroicons/react/24/outline';
 import { CogIcon, UserIcon } from '@heroicons/react/24/solid';
-import Image from 'next/image';
 import type { LinkProps } from 'next/link';
 import Link from 'next/link';
 import { forwardRef, Fragment } from 'react';
@@ -56,9 +56,9 @@ const UserDropdown = () => {
           className="flex max-w-xs items-center rounded-full text-sm ring-1 ring-gray-700 hover:ring-gray-500 focus:outline-none focus:ring-gray-500"
           data-testid="user-menu"
         >
-          <Image
+          <CachedImage
             className="h-8 w-8 rounded-full object-cover sm:h-10 sm:w-10"
-            src={user?.avatar || ''}
+            src={user ? user.avatar : ''}
             alt=""
             width={40}
             height={40}
@@ -79,9 +79,9 @@ const UserDropdown = () => {
           <div className="divide-y divide-gray-700 rounded-md bg-gray-800 bg-opacity-80 ring-1 ring-gray-700 backdrop-blur">
             <div className="flex flex-col space-y-4 px-4 py-4">
               <div className="flex items-center space-x-2">
-                <Image
+                <CachedImage
                   className="h-8 w-8 rounded-full object-cover sm:h-10 sm:w-10"
-                  src={user?.avatar || ''}
+                  src={user ? user.avatar : ''}
                   alt=""
                   width={40}
                   height={40}