Add chi router app and go.mod with chi dependency

cmd/app/main.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"net/http"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/go-chi/chi/v5/middleware"
+)
+
+func main() {
+	// Create a new router
+	r := chi.NewRouter()
+
+	// Add some middleware for logging and recover
+	r.Use(middleware.Logger)
+	r.Use(middleware.Recoverer)
+
+	// Register the hello world handler at the root path
+	r.Get("/", helloHandler)
+
+	// Serve static HTML files from the "static" directory
+	// (e.g., /static/index.html will be accessible at /static/index.html)
+	FileServer(r, "/static", http.Dir("./static"))
+
+	// Start the HTTP server
+	http.ListenAndServe(":8080", r)
+}
+
+// helloHandler responds with a simple "Hello, World!" message.
+func helloHandler(w http.ResponseWriter, r *http.Request) {
+	w.Write([]byte("Hello, World!"))
+}
+
+// FileServer sets up a http.FileServer handler for serving static files.
+func FileServer(r chi.Router, publicPath string, root http.FileSystem) {
+	if publicPath == "" {
+		publicPath = "/"
+	}
+	// Ensure the path ends with a slash
+	if publicPath[len(publicPath)-1] != '/' {
+		publicPath += "/"
+	}
+	fs := http.StripPrefix(publicPath, http.FileServer(root))
+	r.Get(publicPath+"*", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		fs.ServeHTTP(w, r)
+	}))
+}

go.mod

@@ -0,0 +1,5 @@
+module draw-tools
+
+go 1.22
+
+require github.com/go-chi/chi/v5 v5.0.12

go.sum

@@ -0,0 +1,2 @@
+github.com/go-chi/chi/v5 v5.0.12 h1:9euLV5sTrTNTRUU9POmDUvfxyj6LAABLUcEWO+JJb4s=
+github.com/go-chi/chi/v5 v5.0.12/go.mod h1:DslCQbL2OYiznFReuXYUmQ2hGd1aDpCnlMNITLSKoi8=