Added a basic homepage

internal/middleware/cache.go

@@ -0,0 +1,22 @@
+package middleware
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/labstack/echo/v4"
+)
+
+// CacheControl sets a Cache-Control header with a given max age.
+func CacheControl(maxAge time.Duration) echo.MiddlewareFunc {
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(ctx echo.Context) error {
+			v := "no-cache, no-store"
+			if maxAge > 0 {
+				v = fmt.Sprintf("public, max-age=%.0f", maxAge.Seconds())
+			}
+			ctx.Response().Header().Set("Cache-Control", v)
+			return next(ctx)
+		}
+	}
+}