refactor(examples): remove concat uses

examples/demo/Makefile

@@ -0,0 +1,2 @@
+build:
+	go build -ldflags '-s -w' -o demo .

examples/demo/README.md

@@ -1,9 +1,9 @@
 ## demo
 
-Run from root project directory
+Run from this directory
 
 ```bash
-$ go run examples/demo/*.go
+$ go run .
 ```
 
 To build

examples/demo/main.go

@@ -5,7 +5,6 @@ import (
 	"os"
 
 	"net/http"
-	"path/filepath"
 
 	"github.com/kitabisa/teler-waf"
 	"gitlab.com/golang-commonmark/mdurl"
@@ -17,10 +16,6 @@ type Data struct {
 	ReqId string
 }
 
-func concat(path string) string {
-	return filepath.Join("examples", "demo", path)
-}
-
 func myHandler(w http.ResponseWriter, r *http.Request) {
 	data := Data{Query: mdurl.Decode(r.URL.RawQuery), Body: r.FormValue("body")}
 	index.Execute(w, data)

examples/demo/template.go

@@ -2,5 +2,5 @@ package main
 
 import "text/template"
 
-var index = template.Must(template.ParseFiles(concat("index.html")))
-var ouch = template.Must(template.ParseFiles(concat("403.txt")))
+var index = template.Must(template.ParseFiles("index.html"))
+var ouch = template.Must(template.ParseFiles("403.txt"))

examples/demo/var.go

@@ -2,4 +2,4 @@ package main
 
 import "net/http"
 
-var static = http.FileServer(http.Dir(concat("static")))
+var static = http.FileServer(http.Dir("static"))