Fix signup and login links

Author: nicolelim02

frontend/src/pages/LogIn/index.tsx

@@ -134,7 +134,7 @@ const LogIn: React.FC = () => {
                     textDecoration: "underline",
                   },
                 }}
-                onClick={() => navigate("/signup")}
+                onClick={() => navigate("/auth/signup")}
               >
                 Sign up
               </StyledTypography>

frontend/src/pages/SignUp/index.tsx

@@ -172,7 +172,7 @@ const SignUp: React.FC = () => {
                   textDecoration: "underline",
                 },
               }}
-              onClick={() => navigate("/login")}
+              onClick={() => navigate("/auth/login")}
             >
               Log in
             </Typography>