Merge commit from fork

* (security) Mandate content-type on POST calls

* (security) Add JSON content-type in POST requests with a body

* Added Content Type on missing endpoints

* (review) docs and newlines

* (docs) add JSON content type header

* style(clang-format): fix lint errors

---------

Co-authored-by: axfla <axfla@hotmail.fr>
Co-authored-by: ReenigneArcher <42013603+ReenigneArcher@users.noreply.github.com>

src_assets/common/assets/web/pin.html

@@ -39,7 +39,13 @@
         let name = document.querySelector("#name-input").value;
         document.querySelector("#status").innerHTML = "";
         let b = JSON.stringify({pin: pin, name: name});
-        fetch("./api/pin", {method: "POST", body: b})
+        fetch("./api/pin", {
+          method: "POST", 
+          headers: {
+            'Content-Type': 'application/json'
+          }, 
+          body: b
+        })
           .then((response) => response.json())
           .then((response) => {
             if (response.status === true) {