Allow changing the session lifetime

Signed-off-by: Andrej Shadura <andrew.shadura@collabora.co.uk>

docker/configure-app.sh

@@ -25,6 +25,12 @@ then
     ln -sf /run/secrets/msmtprc /etc/msmtprc
 fi
 
+if [ -n "$OBS_SESSION_LIFETIME_DAYS" ]
+then
+    sed -i 's/:expire_after => .*$/:expire_after => '"$OBS_SESSION_LIFETIME_DAYS"'.day/' \
+        /usr/share/obs/api/config/initializers/session_store.rb
+fi
+
 service memcached start
 echo "Setup rails app. Skip duplicate database error if database already exist."
 /usr/share/obs/api/script/rake-tasks.sh setup