To get the filename of the currently executing script, you can use the __filename environment variable in Node.js
For example, let's say we have a file called myscript.js inside a directory called scripts.
Inside this myscript.js file let's log the value of the __filename environment variable like this,
scripts/myscript.js
console.log("Filename of executing script:", __filename);
If we were to execute the script using the command node scripts/myscript.js from the terminal, we would get the absolute path to the filename of the currently executing script,
Filename of executing script: /Users/melvingeorge/scripts/myscript.js
like this.
See this example live in repl.it.