update makefile

Makefile

@@ -1,15 +1,15 @@
-.PHONY: rel deps
+.PHONY: _build
 
-all: deps compile
+BASE_DIR = $(shell pwd)
+REBAR    = $(BASE_DIR)/rebar3
 
-compile:
-	rebar compile
+all: compile
 
-deps:
-	rebar get-deps
+compile:
+	@$(REBAR) compile
 
 clean:
-	rebar clean
+	@$(REBAR) clean
 
-rel: deps
-	rebar compile && cd rel && rebar generate
+rel:
+	@$(REBAR) release

README.md

@@ -1,6 +1,6 @@
 Observer Web
 ============
-Observer Web is Erlang observer web frontend, base code borrowed from observer gui.
+Observer Web is erlang observer web frontend, base code borrowed from observer gui.
 
 ## Feature
 Currently supported:
@@ -16,7 +16,7 @@ make rel
 ```
 To start the release in the foreground.
 ```bash
-./rel/observerweb/bin/observerweb console
+./_build/default/rel/observerweb/bin/observerweb console
 ```
 Open http://127.0.0.1:8080 in your browser