Use tee to direct post upgrade scripting output to container log

docker-entrypoint.sh

@@ -359,7 +359,7 @@ _main() {
 
  # For development of pgautoupgrade. This spot leaves the container running, prior to the pgautoupgrade scripting
  # executing
- UPGRADE_PERFORMED=0
+ local UPGRADE_PERFORMED=0
  if [ "x${PGAUTO_DEVEL}" = "xbefore" ]; then
  echo "---------------------------------------------------------------------------"
  echo "In pgautoupgrade development mode, paused prior to pgautoupgrade scripting."
@@ -607,7 +607,7 @@ _main() {
  # Launch script that does the background post-upgrade tasks
  echo "**********************************************************************************************************************"
  TIMESTAMP_NOW=$(date +'%Y.%m.%d-%H.%M')
- /usr/local/bin/pgautoupgrade-postupgrade.sh "${SCRIPT_OPTIONS}" >"${PGDATA}/${TIMESTAMP_NOW}-pgautoupgrade.log" 2>&1 &
+ /usr/local/bin/pgautoupgrade-postupgrade.sh "${SCRIPT_OPTIONS}" 2>&1 | tee "${PGDATA}/${TIMESTAMP_NOW}-pgautoupgrade.log" &
  echo "Post upgrade script launched, with output being saved to ${PGDATA}/${TIMESTAMP_NOW}-pgautoupgrade.log in the container"
  echo "**********************************************************************************************************************"
  fi