Add 'osusergo' tag

Avoids warnings like "Using 'getgrouplist' in statically linked
applications requires at runtime the shared libraries from the glibc
version used for linking"

Makefile

@@ -21,7 +21,7 @@ RM=--rm
 RUN_FLAGS=-ti
 BUILD_IN_CONTAINER=true
 GO_ENV=GOGC=off
-GO_BUILD_TAGS='netgo unsafe'
+GO_BUILD_TAGS='netgo osusergo unsafe'
 GO_BUILD_FLAGS=-mod vendor -ldflags "-extldflags \"-static\" -X main.version=$(SCOPE_VERSION) -s -w" -tags $(GO_BUILD_TAGS)
 
 ifeq ($(GOARCH),arm)