Avoid mkdir error message

Error message:
  mkdir: cannot create directory '/var/run/grafana': File exists

Author: Frank Streitzig

docker-launcher-postgres.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-mkdir /var/run/grafana && chown grafana /var/run/grafana
+mkdir -p /var/run/grafana && chown grafana /var/run/grafana
 
 if [ ! -f /pgwatch2/persistent-config/self-signed-ssl.key -o ! -f /pgwatch2/persistent-config/self-signed-ssl.pem ] ; then
     openssl req -x509 -newkey rsa:4096 -keyout /pgwatch2/persistent-config/self-signed-ssl.key -out /pgwatch2/persistent-config/self-signed-ssl.pem -days 3650 -nodes -sha256 -subj '/CN=pw2'