apache fails to start in docker container after stop

[RuralYak]

Steps:

1. Start Hauk docker container
   docker run hauk

2. Stop Hauk docker container
   docker stop hauk

3. Start stopped container
   docker start hauk

ER: Http server shall start normally

Stopping apache
Stopping memcached
Signal handled: Terminated.
Done
Started
AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.17.0.2. Set the 'ServerName' directive globally to suppress this message
AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.17.0.2. Set the 'ServerName' directive globally to suppress this message
[Tue Dec 10 23:13:22.972758 2019] [mpm_prefork:notice] [pid 16] AH00163: Apache/2.4.38 (Debian) PHP/7.4.0 configured -- resuming normal operations
[Tue Dec 10 23:13:22.972836 2019] [core:notice] [pid 16] AH00094: Command line: '/usr/sbin/apache2 -D FOREGROUND'

AR: Apache fails to start because of stale pid file:

AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.24.0.2. Set the 'ServerName' directive globally to suppress this message
httpd (pid 18) already running

[bilde2910]

Resolved by #93