add the Production flag, command-line options, and DebugMode computed flag, and put it in the main places I expect it to be used

ui/render_wrap.go

@@ -16,6 +16,7 @@ import (
 	"net/http"
 	"time"
 
+	"git.erbosoft.com/amy/amsterdam/config"
 	"git.erbosoft.com/amy/amsterdam/database"
 	"github.com/klauspost/lctime"
 	"github.com/labstack/echo/v4"
@@ -141,6 +142,7 @@ func AmSendPageData(ctxt echo.Context, amctxt AmContext, command string, data an
 			}
 		}
 		amctxt.VarMap().Set("__bannerad", ad)
+		amctxt.VarMap().Set("__debugMode", config.GlobalComputedConfig.DebugMode)
 		if tmp := amctxt.GetScratch("frame_suppressLogin"); tmp != nil {
 			amctxt.VarMap().Set("__suppressLogin", true)
 		}