Domain doesn't redirect to https, instead shows generic page

Hi all, I have a strange problem. I have multiple domains mapped to one droplet. All of them are working fine. Now, I added a new domain, say, example.com. This new domain has two other subdomains app.example.com and engine.example.com. app is nodejs app and it’s working fine. engine is wordpress instance and it’s working fine, too. Now, I want the main domain example.com to show contents from /var/www/example.com/public_html. The .conf file looks like this:

 <VirtualHost *:80>
     ServerAdmin hi@example.com
     ServerName example.com
     ServerAlias www.example.com
     DocumentRoot /var/www/example.com/public_html

     Redirect / https://www.example.com/

     <Directory /var/www/example.com/public_html/>
         Options Indexes FollowSymLinks MultiViews
         AllowOverride all
         Require all granted
     </Directory>
     ErrorLog ${APACHE_LOG_DIR}/error.log
     CustomLog ${APACHE_LOG_DIR}/access.log combined
 </VirtualHost>

 <IfModule mod_ssl.c>
 <VirtualHost *:443>

         ServerAdmin hi@example.com
         ServerAlias www.example.com
         ServerName example.com
         DocumentRoot /var/www/example.com/public_html

         <Directory /var/www/example.com/public_html/>
             Options Indexes FollowSymLinks MultiViews
             AllowOverride all
             Require all granted
         </Directory>
         SSLEngine on

         SSLCertificateFile /etc/apache2/ssl/*.example.com/fullchain.pem
         SSLCertificateKeyFile /etc/apache2/ssl/*.example.com/key.pem

     SSLProtocol all -SSLv2 -SSLv3
     SSLHonorCipherOrder on
     SSLCipherSuite "EECDH+ECDSA+AESGCM EECDH+aRSA+AESGCM EECDH+ECDSA+SHA384 EECDH+ECDSA+SHA256 EECDH+aRSA+SHA384 EECDH+aRSA+SHA256 EECDH+aRSA+RC4 EECDH EDH+aRSA RC4 !  aNULL !eNULL !LOW !3DES !MD5 !EXP !PSK !SRP !DSS"
 </VirtualHost>
 </IfModule>

Looks fine to me. Except that visiting example.com does not redirect to https://www.example.com. Instead, visiting example.com shows contents from /var/www/html. However, visiting https://www.example.com shows contents from /var/www/example.com/public_html/

What am I missing here?

Also, if it helps, the cname record is

www.example.com example.com

and the a record is

example.com my.droplet.ip