Add support to build with frontend in image in tfw.sh

hack/tfw.sh

@@ -47,15 +47,24 @@ baseimage_releasename()
     printf "${VERSION}-${DATE}"
 }
 
-build_test()
+build_test_internal()
 {
     build_baseimage
     cd $TEST_PATH
     docker build -t $IMAGE_NAME                           \
                  -f ${BUILD_CONTEXT}/Dockerfile           \
                  --build-arg BUILD_CONTEXT=$BUILD_CONTEXT \
-                 --build-arg NOFRONTEND=1                 \
-                 .
+                 ${ARGS} .
+}
+
+build_test()
+{
+    ARGS="--build-arg NOFRONTEND=1" build_test_internal
+}
+
+build_test_withfrontend()
+{
+    ARGS="--no-cache" build_test_internal
 }
 
 run_test()
@@ -101,6 +110,9 @@ case $1 in
     build)
         build_test
     ;;
+    buildwithfrontend)
+        build_test_withfrontend
+    ;;
     start)
         start_test
     ;; 
@@ -109,6 +121,7 @@ case $1 in
         echo "          |--- buildtfw:          build TFW baseimage"
         echo "          |--- releasetfw:        tag TFW baseimage and push to upstream"
         echo "          |--- build:             build TFW test"
+        echo "          |--- buildwithfrontend: build TFW test, include frontend in image"
         echo "          |--- start:             build & start TFW test"
     ;;
 esac