GitlabAutoCommit.js

const fetch = require('node-fetch');

const getPostObj = ({ branch = 'main', msg = 'auto commit', content = '', file_path = null, action = 'update' }) => ({
    branch,
    commit_message: msg,
    "actions": [
        {
            action,
            file_path,
            content
        },

    ]

})

const commit = async () => {
    let project = 'YOUR_PROJECT_ID'
    let fileContent = 'IM just a text file'
    let obj = getPostObj({
        content: JSON.stringify(fileContent, null, 2),
        file_path: 'PATH_IN_YOUR_REPO.txt'
    })
    let headers = {
        'PRIVATE-TOKEN': 'YOUR_PRIVATE_TOKEN',
        'Content-Type': 'application/json'
    }
    let url = `https://gitlab.com/api/v4/projects/${project}/repository/commits`

    let res = await fetch(url, {
        method: 'POST', // or 'PUT'
        headers: { ...headers },
        body: JSON.stringify(obj, null, 2),
    })
}