hook fix

src/pages/Instruction.jsx

@@ -1,9 +1,22 @@
 function Instruction() {
-    return (
-        <div>
-            Tu miała być instrukcja
-        </div>
-    )
+  return (
+    <iframe
+      src={`${import.meta.env.VITE_PUBLIC_URL}/instruction.pdf`}
+      style={{ width: "100%", height: "100vh" }}
+    ></iframe>
+  );
 }
 
-export default Instruction
+export default Instruction;
+
+/*
+<object
+      type="application/pdf"
+      src={link}
+      style={{ width: "100%", height: "100vh" }}
+    >
+      <p>
+        PDF cannot be displayed. <a href={link}>Download PDF</a>
+      </p>
+    </object>
+*/