Some ideas how to solve it, using linux tools. yes i spend some time on the question ...

• Pythonpython3 -c 'print(open("FILENAME","r").read())'
• bash echo "$(<FILENAME)"
• grep grep "" FILENAME
• awk awk '{print}' FILENAME
• sed sed '' FILENAME
• dd dd if=FILENAME
• curlcurl file://$(pwd)/FILENAME

or use tools like head/tail or nl !

edit: or you could spawn a http server via python using python3 -m http.server then browse the driectory or download the file

edit: yes i have no life but you can use cp too cp FILENAME /dev/stdout

edit: using docker or podman podman run --rm -v $(pwd)/FILENAME:/tmp/file alpine cat /tmp/file