Change owner of /opt/keypass files

Previous versions of keypass (1.9.0 and below) had all files in `/opt/keypass` belong to UID 1000. This made it possible to run the container with an unprivileged user (1000).

Version 1.11.0 dropped the `chown` from the Dockerfile and had all files in /opt/keypass owned by root.

Since the `keypass-entrypoint.sh` performs some inline changes with `sed -i` in `/opt/keypass/config.yml`, it has to be run as root. Which breaks some security constraints in openshift.

This PR restores ownership of the `/opt/keypass` folder to UID 1000, keeping backward compatibility with the security policy configured for keypass 1.9.0

Dockerfile

@@ -46,7 +46,8 @@ RUN \
     apt-get -y remove maven && \
     apt-get -y autoremove --purge && \
     # Don't need old log files inside docker images
-    rm -f /var/log/*log
+    rm -f /var/log/*log && \
+    chown -R 1000:1000 /opt/keypass
 
 # Define the entry point
 ENTRYPOINT ["/opt/keypass/keypass-entrypoint.sh"]