Elixir - How to embed an image into an html , on email - html

Question

I am trying to embed an image to html when sending email.
I have the image (logo.png) and html (welcome.html.eex) located under priv
Sadly, I receive the email without the image in it.
here is the email I receive:
when I inspect element I get: (no src=" ... ")
<img width="212px" height="26px" align="bottom">
though - when I preview locally my html (from my-html.html - see in my code ) seems ok:
here is my welcome.html.eex
<p>
<span>
<strong>Bem-Vindo hii</strong> à
<img
src="<%= ~s(data:image/png;base64,) <> Base.encode64(File.read! (Path.join("#{:code.priv_dir(:my_app)}", "logo.png"))) %>"
width="212px" height="26px" align="bottom"/>
</span>
</p>
here is my code, sending email adding the html using bamboo:
import Bamboo.Email
def send_verify_email() do
File.write "my-html.html", get_html() # writing the html localy - to verify..
new_email()
|> to("foo#bar.com")
|> from(#from_addr)
|> subject("Welcome")
|> html_body(get_html())
|> Mailer.deliver_later
end
end
def get_html() do
EEx.eval_file(Path.join("#{:code.priv_dir(:my_app)}", "welcome.html.eex"), [tok: "123"])
end
what am I doing wrong?
how can I attach a base 64 image on email html?
edit
I also tried adding image by path
welcome.html.eex
<img src="<%= Path.join("#{:code.priv_dir(:my_app)}", "logo.png") %>"
but still get same results - locally html seems ok, but on email html is:
when I inspect I get
<img src="https://ci4.googleusercontent.com/proxy/4eMU8Te6MM215JLJ5gm3Z9jnC4hytOkDeF4ldFGb1pC17GDhtZphCtH623p1ZwNYZxBfAatQtlX_V9MKALbOE0jIzxVXJ43tZLeA5hUT7tjs7FEz3_PVoUQ5Ih7w0rvuRtLy7pVqR9UoU5TBF5E=s0-d-e1-ft#http:///home/dina/Documents/WK/my_umbrela_app/_build/dev/lib/my_app/priv/logo.png" width="212px" height="26px" align="bottom" class="CToWUd">
so I do have src="" but it seems broken.. :(