【heroku】アカウント作成〜アプリ配置まで試してみた

$ brew tap heroku/brew && brew install heroku #←これ実行
Updating Homebrew...
Warning: You are using macOS 11.0.
We do not provide support for this released but not yet supported version.
You will encounter build failures with some formulae.

# --- 中略... ---

Error: Your Command Line Tools are too outdated.
Update them from Software Update in System Preferences or run:
  softwareupdate --all --install --force

If that doesn't show you an update run:
  sudo rm -rf /Library/Developer/CommandLineTools
  sudo xcode-select --install

Alternatively, manually download them from:
  https://developer.apple.com/download/more/.

Error: Your CLT does not support macOS 11.0.
It is either outdated or was modified.
Please update your CLT or delete it if no updates are available.

Enumerating objects: 7192, done.
Counting objects: 100% (7192/7192), done.
Delta compression using up to 4 threads
Compressing objects: 100% (6807/6807), done.
Writing objects: 100% (7192/7192), 6.52 MiB | 1.72 MiB/s, done.
Total 7192 (delta 1379), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote: 
remote:  !     No default language could be detected for this app.
remote:                         HINT: This occurs when Heroku cannot detect the buildpack to use for this application automatically.
remote:                         See https://devcenter.heroku.com/articles/buildpacks
remote: 
remote:  !     Push failed
remote: Verifying deploy...
remote: 
remote: !       Push rejected to rocky-wildwood-40562.
remote: 
To https://git.heroku.com/rocky-wildwood-40562.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/rocky-wildwood-40562.git'

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var session = require('express-session');
var logger = require('morgan');
var app = express();

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');

var MySQLStore = require('express-mysql-session')(session);

var options = {
  host: 'mysql',
  port: 3306,
  user: 'root',
  password: 'password',
  database: 'todo'
};

var sessionStore = new MySQLStore(options);