[[0,0,0,0],
[0,0,0,0],
[0,0,0,0],
[0,0,0,0]]

[[1,1,1,1,1,1],
[1,0,0,0,0,1],
[1,0,0,0,0,1],
[1,0,0,0,0,1],
[1,0,0,0,0,1],
[1,1,1,1,1,1]]

var matrix = [[0,0,0,0], [0,0,0,0], [0,0,0,0], [0,0,0,0]];

function addBorder(m) {

  var row = []
  for (var i=0; i<m[0].length; i++) {
    row.push(0);
  }

  m.splice(0, 0, row);
  m.push(row);

  for (var i=0; i<m.length; i++) {
    m[i].splice(0,0,1);
    m[i].push(1);
  }

  return m;
}

console.log(matrix)
console.log(addBorder(matrix))

[[1,1,1,1,1,1,1,1],
 [1,0,0,0,0,1],
  [1,0,0,0,0,1],
  [1,0,0,0,0,1],
  [1,0,0,0,0,1],
  [1,1,1,1,1,1,1,1]]