Set tailwindcss binary file name depending on current os (#125)

* Download tailwindcss arm64 binary if on macOS

* add tailwind binary download for macos x64 or arm64

Makefile

@@ -1,5 +1,22 @@
-# The Tailwind CSS CLI package to install (pick the one that matches your OS: https://github.com/tailwindlabs/tailwindcss/releases/latest)
+# Get the OS name in lowercase (linux, darwin)
-TAILWIND_PACKAGE = tailwindcss-linux-x64
+OS_SYSNAME := $(shell uname -s | tr A-Z a-z)
+# Get the machine architecture (x86_64, arm64)
+OS_MACHINE := $(shell uname -m)
+
+# If mac OS, use `macos-arm64` or `macos-x64`
+ifeq ($(OS_SYSNAME),darwin)
+	OS_SYSNAME = macos
+	ifneq ($(OS_MACHINE),arm64)
+		OS_MACHINE = x64
+	endif
+endif
+
+# If Linux, use `linux-x64`
+ifeq ($(OS_SYSNAME),linux)
+	OS_MACHINE = x64
+endif
+
+TAILWIND_PACKAGE = tailwindcss-$(OS_SYSNAME)-$(OS_MACHINE)
 
 .PHONY: help
 help: ## Print make targets
@@ -59,4 +76,4 @@ css: ## Build and minify Tailwind CSS
 
 .PHONY: build
 build: css ## Build CSS and compile the application binary
-	go build -o ./tmp/main ./cmd/web
+	go build -o ./tmp/main ./cmd/web