Add script to automate the update process more

[poll-busily]

We recommend creating an update script in the install notes so lets provide one that works for the environment we refer to there (Debian/Ubuntu). It can be modified to suit the environment and there are comments to explain what the various options do so that an admin can set it up easily.

This script automates both the git pull and setting of permissions on writable directories after the update. It has a bit of error handling for safety and allows the admin to choose whether to update to the tip of master (current behaviour) or to the latest tag.

[poll-busily]

Sample output:

root@cloudlog-vm:/var/www/html# ./update_cloudlog.sh 
Cloudlog update started
-----------------------
Using /var/www/html as working directory
Fetching changes from remote...
Fetched latest changes successfully
Fast-forwarding to HEAD (bleeding-edge)...
Updating 0b84d4c0..bccfa676
Fast-forward
 .gitignore                                    |  1 +
 application/controllers/Lotw.php              | 22 ++++++++++++++++------
 application/controllers/Qso.php               |  1 +
 application/models/LotwCert.php               |  4 +++-
 application/views/interface_assets/footer.php |  5 +++++
 application/views/lotw_views/upload_cert.php  | 13 +++++++++++++
 assets/js/sections/contesting.js              | 36 ++++++++++++++++++++++++++++++++++++
 7 files changed, 75 insertions(+), 7 deletions(-)
Fast-forward finished successfully.
Setting ownership as root:www-data on application/config
Setting ownership as root:www-data on assets/qslcard
Setting ownership as root:www-data on backup
Setting ownership as root:www-data on updates
Setting ownership as root:www-data on uploads
Cloudlog update finished

[magicbug]

Looks good Paul and gives people the option of less hassle of setting things up