How can i add libreoffice to Dockerfile

Adding the following line installs LibreOffice

RUN apk add libreoffice

It is also necessary to install Java Runtime Environment (JRE) in the container, which is required for LibreOffice to function correctly. Adding the following line installs the OpenJDK 8 JRE package on Alpine Linux.

RUN apk add openjdk8-jre

It is possible to run LibreOffice commands in a Node.js application without installing any additional libraries. You can use the child_process module in Node.js to execute any shell command. The child_process module provides several methods to spawn new child processes, which can be used to execute shell commands. In the following code, I have used the exec method to run the LibreOffice command.

// Importing the child_process module from the Node.js standard library
const { exec } = require("child_process");

// Importing the util module from the Node.js standard library
const util = require("util");

// Converting the exec function from a callback-based API to a Promise-based API
const execProm = util.promisify(exec);

// Defining a function to run a command using the execProm function
const runCommand = async (command) => {
  try {
    // Running the command using the execProm function and waiting for it to complete
    await execProm(command);
  } catch (ex) {
    // Handling any errors that occur while running the command
    console.error(ex);
  }
};

// Defining the output directory path
const outputPath = "./output/";

// Defining the input file path
const inputFilePath = "./file.pdf";

// Defining the command to be executed
const command = `soffice --infilter="impress_pdf_import" --convert-to pptx:"Impress MS PowerPoint 2007 XML" --outdir ${outputPath} ${inputFilePath}`;

// Defining a handler function to run the command
const handler = async () => {
  // Calling the runCommand function to execute the command
  await runCommand(command);
};

// Calling the handler function to start the command execution
handler();