fix: Increase min Docker API verison requirement to 1.25

The slim build --dockerfile command uses the Docker Build API feature(s)
that become available only in versions >= 1.25.

Signed-off-by: Ivan Velichko <iximiuz@gmail.com>

pkg/app/master/command/cliflags.go

@@ -353,7 +353,7 @@ func GlobalFlags() []cli.Flag {
 		},
 		&cli.StringFlag{
 			Name:    FlagAPIVersion,
-			Value:   "1.24", //Docker Engine v25.x depricates APIs below 1.24
+			Value:   "1.25", // We need at least 1.25 for to support builds from Dockerfile.
 			Usage:   FlagAPIVersionUsage,
 			EnvVars: []string{"DSLIM_CRT_API_VER"},
 		},