html {
  height: 100%;
}

body {
  height: 100%;
  background-repeat: repeat;
  background-image: image-url('/assets/spree/frontend/bg.png');
}

.container {
  height: 100%;
  box-sizing: border-box;
  border-top: 6px solid #bbb;
  background-color: #fff;

  -moz-box-shadow:    0px 0px 10px 10px #ccc;
  -webkit-box-shadow: 0px 0px 10px 10px #ccc;
  box-shadow:         0px 0px 10px 10px #ccc;
}

footer#footer {
  border-top: 6px solid #bbb;
  margin: 0;
  padding: 0;
  width: 100%;
  background-color: #eee;
  height: 100px;
  position: absolute;
  bottom: 0;
}

footer h2 {
  font-size: 1.3em;
}

footer div#contents {
  margin-left: 50px;
}

html {
  height: 100%;
}

body {
  height: 100%;
  background-repeat: repeat;
  background-image: image-url('spree/frontend/bg.png');
}

.container {
  height: 100%;
  box-sizing: border-box;
  border-top: 6px solid #bbb;
  background-color: #fff;

  -moz-box-shadow:    0px 0px 10px 10px #ccc;
  -webkit-box-shadow: 0px 0px 10px 10px #ccc;
  box-shadow:         0px 0px 10px 10px #ccc;
}

footer#footer {
  border-top: 6px solid #bbb;
  margin: 0;
  padding: 0;
  width: 100%;
  background-color: #eee;
  height: 100px;
  position: absolute;
  bottom: 0;
}

footer h2 {
  font-size: 1.3em;
}

footer div#contents {
  margin-left: 50px;
}

Change path of bg image.
Change path of bg image.
