Fix docker latest tagging

Makefile

@@ -29,19 +29,21 @@ endif
 LOCAL_ARCH := $(shell uname -m)
 ifeq ($(LOCAL_ARCH),x86_64)
 	TARGET_ARCH_LOCAL=amd64
-	LATEST_TAG=latest
 else ifeq ($(shell echo $(LOCAL_ARCH) | head -c 5),armv8)
 	TARGET_ARCH_LOCAL=arm64
-	LATEST_TAG=latest-arm64
 else ifeq ($(shell echo $(LOCAL_ARCH) | head -c 4),armv)
 	TARGET_ARCH_LOCAL=arm
-	LATEST_TAG=latest-arm
 else
 	TARGET_ARCH_LOCAL=amd64
-	LATEST_TAG=latest
 endif
 export GOARCH ?= $(TARGET_ARCH_LOCAL)
 
+ifeq ($(GOARCH),amd64)
+	LATEST_TAG=latest
+else
+	LATEST_TAG=latest-$(GOARCH)
+endif
+
 LOCAL_OS := $(shell uname)
 ifeq ($(LOCAL_OS),Linux)
    TARGET_OS_LOCAL = linux