Print upgrade failere log

upgrade-entrypoint.sh

@@ -26,13 +26,24 @@ if [ -f "$OLD_VERSION_FILE" ]; then
         
         # Run pg_upgrade
         # --link is used to avoid copying files (fast, but requires a backup!)
-        pg_upgrade \
+        if ! pg_upgrade \
             -d $DATA_DIR/old_data \
             -D $DATA_DIR/new_data \
             -b "$OLD_BIN" \
             -B "$NEW_BIN" \
 						-s /tmp \
-            --link
+            --link; then
+
+						echo "========================================"
+            echo "pg_upgrade FAILED! Here is the actual reason why the old server crashed:"
+            echo "========================================"
+            
+            # Print the contents of the server log
+            cat "$DATA_DIR/new_data/pg_upgrade_output.d/*/log/pg_upgrade_server.log"
+            
+            # Exit to prevent the script from continuing
+            exit 1
+				fi
         
 				# Clean-up
         echo "Upgrade complete. Cleaning up..."