fix: JWT kid/jku lessons (#1949)

* refactor: rewrite hints

Use active voice and fix grammar issues.

* fix: use Thymeleaf `th:action`

* fix: JWT kid/jku lessons

Split the JavaScript into two files they pointed to the same URL

The JWTs are now valid, they parse successfully.

The paths now include `/kid` and `/jku` to make sure the hints match accordingly in the UI. Otherwise `/delete` would pick up both hints from both assignments as the paths overlap.

Closes: #1715

* fix: update to latest pre-commit version

* fix: increase timeouts for server to start during integration tests

src/main/resources/lessons/httpbasics/html/HttpBasics.html

@@ -21,10 +21,10 @@
             <!-- of course, you can write your own ajax submission /handling in your own javascript if you like -->
 			<form class="attack-form" accept-charset="UNKNOWN"
 				method="POST" name="form"
-				action="HttpBasics/attack1">
+				th:action="@{/HttpBasics/attack1}">
 				<div id="lessonContent">
 					<form accept-charset="UNKNOWN" method="POST" name="form"
-						action="#attack/307/100">
+						th:action="@{/#attack/307/100}">
 						Enter Your Name: <input name="person" value="" type="TEXT"/><input
 							name="SUBMIT" value="Go!" type="SUBMIT"/>
 					</form>
@@ -51,7 +51,7 @@
                 <!-- of course, you can write your own ajax submission /handling in your own javascript if you like -->
 				<form class="attack-form" accept-charset="UNKNOWN"
 					method="POST" name="form"
-					action="HttpBasics/attack2">
+					th:action="@{/HttpBasics/attack2}">
 					<script>
 					    // sample custom javascript in the recommended way ...
 					    // a namespace has been assigned for it, but you can roll your own if you prefer