Apache2 Virtual Host fails with Name or service not known - apache

Question

Moving from Ubuntu 17.10 to Mint 18.3 and migrating virtual host config files fails with
[core:error] [pid 3012] (EAI 2)Name or service not known: AH00547: Could not resolve host name
On my fresh installed Mint i have done this first
1) sudo a2dissite 000-default.conf
This is my standard Config File using for Vhosts
<VirtualHost *.domain.localhost:80>
ServerName domain.localhost
ServerAlias www.domain.localhost api.domain.localhost
ServerAdmin webmaster#localhost
DocumentRoot /home/dev/projects/domain/web/html/
<Directory /home/dev/projects/domain/web/html/>
Options -Indexes +FollowSymLinks +MultiViews
AllowOverride All
Require all granted
</Directory>
ErrorLog /var/log/apache2/error.log
LogLevel warn
CustomLog /var/log/apache2/access.log combined
ServerSignature Off
</VirtualHost>
BTW: This steps i'm doing for every project
1) sudo chown -R www-data:www-data PATH_TO_DIR
2) sudo chmod 660 -R PATH_TO_DIR
3) sudo chmod -R -x+X PATH_TO_DIR
4) sudo find PATH_TO_DIR -type d -exec chmod g+s {} \;
5) sudo setfacl -R -d -m u::rwX,g::rwX,o::- PATH_TO_DIR
UPDATE:
adding domains to /etc/hosts, reloading server leads again to the default

Answer 1

I have solved it by modifying "000-default.conf" DocumentRoot Path, then modifying "/etc/apache2/apache2.conf" by adding these lines
<Directory /home/mdev/_projects/>
Options Indexes FollowSymLinks
AllowOverride None
Require all granted
</Directory>
Also this had to be changed from
<VirtualHost *.domain.localhost:80>
to
<VirtualHost *:80>
No entries at /etc/hosts neccassary!