Migrated to nix for dependency managment

visualizer/src/views/mod.tsx

@@ -19,6 +19,7 @@ function Court(){
         <line x1={600} x2={600} y1={0} y2={450} style={returnLine}></line>,
     ]
     return (<svg class="court-side"
+                 xmlns="http://www.w3.org/2000/svg"
                  style={{width: 900 + 2 * margin, height: 450 + 2 * margin, backgroundColor: 'pink'}}>
         <g class="court-border" id="court" transform = {`translate(${margin} ${margin})`}>
             <rect width={900} height={450} style={courtBorder}/>