fix: change makefile and install instructions

Makefile

@@ -5,7 +5,7 @@ LIBDIR ?= $(PREFIX)/share/hilbish
 build:
 	@go build
 
-install: build
+install:
 	@install -v -d "$(BINDIR)/" && install -m 0755 -v hilbish "$(BINDIR)/hilbish"
 	@mkdir -p "$(LIBDIR)"
 	@cp libs preload.lua .hilbishrc.lua "$(LIBDIR)" -r

README.md

@@ -22,7 +22,10 @@ Prebuilt binaries are not yet provided, so to try it out you'll have to manually
 ```sh
 git clone https://github.com/Hilbis/Hilbish
 cd Hilbish
+make build
 sudo make install
+# Or 
+sudo make
 ```
 
 ### Uninstall