How to deploy for minimum Python Flask application on Apache / Apache上で最小構成のPython Flaskアプリをデプロイする方法

$ cd /home/ubuntu/
$ mkdir -p hoge/test # hogeアプリのディレクトリ、各種コードはhoge/testに格納する
$ cd hoge
$ python3 -m venv venv
$ source venv/bin/activate
$ pip install flask mod_wsgi
$ vim flaskapp.wsgi

# flaskapp.wsgi
import sys
sys.path.insert(0. '/home/ubuntu/hoge') # wsgiは絶対パスによる参照が必要
from test import app as application # 後述

$ cd /home/ubuntu/hoge/test
$ vim __init__.py

# __init__.py
from flask import Flask
app = Flask(__name__)
@app.route(’/’)
def index():
return ‘hoge’
if name == ‘main’:
app.run(host=‘0.0.0.0’)

$ cd /etc/apache2/sites-available/
$ sudo cp 000-default.conf 000-default.conf.bk # バックアップ
$ sudo vim 000-default.conf

# 000-default.conf
LoadModule wsgi_module "/home/ubuntu/hoge/venv/lib/python3.8/site-packages/mod_wsgi/server/mod_wsgi-py38.cpython-38-x86_64-linux-gnu.so" # 補足①を参照
WSGIPythonHome "/home/ubuntu/hoge/venv"
WSGIScriptAlias /hoge /home/ubuntu/hoge/flaskapp.wsgi
<VirtualHost *:80>
        # The ServerName directive sets the request scheme, hostname and port that
        # the server uses to identify itself. This is used when creating
        # redirection URLs. In the context of virtual hosts, the ServerName
        # specifies what hostname must appear in the request's Host: header to
        # match this virtual host. For the default virtual host (this file) this
        # value is not decisive as it is used as a last resort host regardless.
        # However, you must set it for any further virtual host explicitly.
        #ServerName www.example.com
    ServerAdmin webmaster@localhost
    ServerName sample.com
    DocumentRoot /var/www/html

    &lt;Directory /home/ubuntu/hoge &gt; # アクセス許可のためのディレクティブ設定
            Require all granted
    &lt;/Directory&gt;

    # Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
    # error, crit, alert, emerg.
    # It is also possible to configure the loglevel for particular
    # modules, e.g.
    #LogLevel info ssl:warn

    ErrorLog ${​​​​​APACHE_LOG_DIR}​​​​​​​​​​​​/error.log
    CustomLog ${​​​​​​​​​​​​​​​​​​​APACHE_LOG_DIR}​​​​​​​​​​​​​​​​​​​​​​​​​​/access.log combined

    # For most configuration files from conf-available/, which are
    # enabled or disabled at a global level, it is possible to
    # include a line for only one particular virtual host. For example the
    # following line enables the CGI configuration for this host only
    # after it has been globally disabled with &quot;a2disconf&quot;.
    #Include conf-available/serve-cgi-bin.conf
</VirtualHost>

$ mod_wsgi module-config