Solutions

Here's a non-exhaustive list of possible solutions to try.

Change settings of your static site generator

Some static site generators have settings to change how static files are outputted.

Change your host provider

Use a host provider that supports better the static files created by your static site generator.

Look into your current host provider options to fine-tune how files are served.

Post-process your static site generator output before deployment

It is possible to change from one static file pattern /myPath.html to another /myPath/index.html.

Notice that most host providers don't create redirect if both files are present, so you could also use both patterns at the same time.

A simple Node.js script can be used to process your static site before deployment, for example:

const glob = require('glob-promise');
const path = require('path');
const fs = require('fs-extra');

// /myPath/index.html => /myPath.html
async function generateSimpleHtmlFiles(outDir) {

  const pattern = path.join(outDir, '/**/index.html');
  const filePaths = (await glob(pattern)).filter(filePath => {
    return filePath !== path.join(outDir, '/index.html');
  });


  await Promise.all(
    filePaths.map(async filePath => {
      if ((await fs.stat(filePath)).isDirectory()) {
        return;
      }
      const filePathCopy = `${path.dirname(filePath)}.html`;
      if (await fs.pathExists(filePathCopy)) {
      } else {
        await fs.copyFile(filePath, filePathCopy);
      }
    })
  );
}

generateSimpleHtmlFiles("/public"); // Your static site output folder