https://docs.vultr.com/java/examples/convert-file-to-byte-array-and-vice-versa
Java, you can convert a file to a byte array using different methods like Files.readAllBytes(), FileInputStream, or ByteArrayOutputStream.
1. Using Files.readAllBytes() (Best for Small Files, Java 7+)
This is the simplest and most efficient way to read a file into a byte array.
