How to send Discord embed with background image and user avatar/info

I'm fairly new to making discord bots using python, and I'm trying to copy a feature i saw on some bots. one of them is this:

A discord embed with an image background and user avatar in the middle and name below

here is what I made so far

@bot.eventasync def on_member_join(member):    channel = bot.get_channel(channel ID)    embed = discord.Embed(        description= f'Welcome **{member.mention}** to the sever',        color=0xff55ff,        timestamp=datetime.datetime.now()    )    await channel.send(embed=embed)

how do I achieve this embed above?