feat: Add readme and add some info on block times when adding notification

templates/account.html

@@ -87,6 +87,8 @@
             <div class="form-group">
                 <label for="blocks">Blocks before expiry</label>
                 <input type="number" id="blocks" name="blocks" required min="1" max="50000" value="1008">
+                <!-- Add a note that 144 blocks is 1 day, 1008 blocks is a week, and 4320 blocks is a month -->
+                <p class="note">Note: 144 blocks is approximately 1 day, 1008 blocks is approximately 1 week, and 4320 blocks is approximately 1 month.</p>
             </div>
 
             <button type="submit" class="button">Add {{notificationType.type.replace('_', ' ').title()}} Notification</button>