How to solve the problem of displaying an image when using RelativeSource TemplatedParent?

Question

WPF

Button style

<Style TargetType="Button" x:Key="Style_Navigation_Btn">
            <Setter Property="OverridesDefaultStyle" Value="True"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Button" >
                        <Border  
                            x:Name="border"
                            BorderBrush="#EFEFEF" 
                            BorderThickness ="0 0 0 1" 
                            Background="White"
                            Cursor="Hand">

                            <Grid >
                                
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="*"/>
                                    <ColumnDefinition Width="250"/>
                                </Grid.ColumnDefinitions>

                                <Image 
                                    x:Name="image"
                                    Width="30" 
                                    Height="50"
                                    Source ="{Binding Path=Tag, RelativeSource="{RelativeSource TemplatedParent}}" / >
             

                                <TextBlock 
                                    x:Name="text" 
                                    Foreground="#3094e6" 
                                    FontSize="20" 
                                    Margin="10 0 0 0" 
                                    VerticalAlignment="Center" 
                                    Text="{TemplateBinding Content}" 
                                    Grid.Column="1" />

                            </Grid>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter TargetName="border" Property="Background" Value="#3094e6" />
                                <Setter TargetName="text" Property="Foreground" Value="white"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

Usage

<Button 
Command="{Binding bStorage}" 
Tag="C:\Users\akautdinov_ai\Desktop\StorageApp\StorageApp\Images\package.png" Style="{StaticResource Style_Navigation_Btn}"  
Content="Склад" />

The bottom line is that you have to write the entire path of the picture (Variants with multiBinding and StringFormat do not work). So here's how you can do it so that you enter the path from the current directory. Proven method please.