Base test that function

There is an error just after the test succes because the app tries to
close the db twice... but at least it works. i'll try to work around
that later :p

backend/build.gradle.kts

@@ -32,6 +32,7 @@ dependencies {
 	testImplementation("org.testcontainers:junit-jupiter")
 	testImplementation("org.testcontainers:postgresql")
 	testImplementation("io.rest-assured:rest-assured")
+	testImplementation("org.hamcrest:hamcrest")
 }
 
 tasks.register("run") {