Better description of add + fix regression form validation + fix http server not using strokeWidth + add doc about hardcoded

docs/Hardcoded.md

@@ -0,0 +1,14 @@
+> Here you will find the documentation of desastrous stuff that I made
+
+# XPositionReference
+
+XPositionReference is used as a fake horizontal offset indicator.
+
+The truth is that the svg will always take the left for its transformations and the best for us is to do the same.
+
+That's why everything that is shown to the user about XPositionReference is an illusion. Like for example:
+- The inputs, see `PropertiesOperations.ts`, `StaticForm`, `DynamicForm`.
+- Child dimensions, see `Container.ts`.
+
+
+Look for use of `transformX()` and `restoreX()`.