adds make quick target

adds a new target that compiles dsnet w/o running upx for quicker
development builds

Makefile

@@ -1,11 +1,15 @@
-.PHONY: all build
+.PHONY: all build compile quick
 
 all: build
 
-build:
+compile:
 	CGO_ENABLED=0 GOOS=linux go build -mod=vendor -a -ldflags="-s -w" -o dist/dsnet ./cmd/dsnet.go
+
+build: compile
 	upx dist/dsnet
 
+quick: compile
+
 update_deps:
 	# `go mod vendor` initialises vendoring system
 	go get