Change the pointer for the canvas
Change the offset for the drawing of the line

When using a mouse pointer to draw the line, change the offset to “-10”
which moves the “endpoint” of the line to closer to the middle of the
cursor.
Change routing for css / js files

Allow pointing to css / js files via “/css/*” or “/js/*” via HTML while
still keeping the files physically located under “static.”
Fix broken link

css file isn’t located in /static/js
Update links, remove "static"