The expressions:
outputs('Get_file_content_using_path')?['body']['$content-type']
outputs('Get_file_content_using_path')?['body']['$content']
The Html for the body:
<img src="data:@{outputs('Get_file_content_using_path')?['body']['$content-type']};base64,@{outputs('Get_file_content_using_path')?['body']['$content']}" />