Enable Apache module named: Mod_ssl and Mod_rewrite.

a2enmod ssl
a2enmod rewrite

vi /etc/apache2/apache2.conf

<Directory /var/www/html>
AllowOverride All
</Directory>

# mkdir /etc/apache2/certificate
# cd /etc/apache2/certificate
# openssl req -new -newkey rsa:4096 -x509 -sha256 -days 365 -nodes -out apache-certificate.crt -keyout apache.key

Generating a RSA private key
............++++
.......................................................++++
writing new private key to 'apache.key'
-----
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [AU]:BR
State or Province Name (full name) [Some-State]:Rio de Janeiro
Locality Name (eg, city) []:
Organization Name (eg, company) [Internet Widgits Pty Ltd]:TechExpert
Organizational Unit Name (eg, section) []:
Common Name (e.g. server FQDN or YOUR name) []:200.200.200.200
Email Address []:

# vi /etc/apache2/sites-enabled/000-default.conf

Here is the file, before our configuration.

<VirtualHost *:80>
      ServerAdmin webmaster@localhost
      DocumentRoot /var/www/html
      ErrorLog ${APACHE_LOG_DIR}/error.log
      CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

Here is the file, after our configuration.

<VirtualHost *:443>
      ServerAdmin webmaster@localhost
      DocumentRoot /var/www/html
      ErrorLog ${APACHE_LOG_DIR}/error.log
      CustomLog ${APACHE_LOG_DIR}/access.log combined
      SSLEngine on
      SSLCertificateFile /etc/apache2/certificate/apache-certificate.crt
      SSLCertificateKeyFile /etc/apache2/certificate/apache.key
</VirtualHost>

Optionally, you may want to redirect HTTP users to the HTTPS version of your website.

<VirtualHost *:80>
      RewriteEngine On
      RewriteCond %{HTTPS} !=on
      RewriteRule ^/?(.*) https://%{SERVER_NAME}/$1 [R=301,L]
</virtualhost>
<VirtualHost *:443>
      ServerAdmin webmaster@localhost
      DocumentRoot /var/www/html
      ErrorLog ${APACHE_LOG_DIR}/error.log
      CustomLog ${APACHE_LOG_DIR}/access.log combined
      SSLEngine on
      SSLCertificateFile /etc/apache2/certificate/apache-certificate.crt
      SSLCertificateKeyFile /etc/apache2/certificate/apache.key
</VirtualHost>

Restart the Apache service

service apache2 restart