adds setup and util scripts

clean_docker.sh

@@ -0,0 +1,26 @@
+EXITED=$(docker ps -q -f status=exited)
+DANGLING=$(docker images -q -f "dangling=true")
+DANGLING_VOLUME=$(docker volume ls -qf "dangling=true")
+
+if [ "$1" == "--dry-run" ]; then
+  echo "==> Would stop containers:"
+  echo $EXITED
+  echo "==> And images:"
+  echo $DANGLING
+else
+  if [ -n "$EXITED" ]; then
+    docker rm $EXITED
+  else
+    echo "No containers to remove."
+  fi
+  if [ -n "$DANGLING" ]; then
+    docker rmi $DANGLING
+  else
+    echo "No images to remove."
+  fi
+  if [ -n "$DANGLING_VOLUME" ]; then
+    docker volume rm $DANGLING_VOLUME
+  else
+    echo "No volumes to remove."
+  fi
+fi

setup.sh

@@ -0,0 +1,18 @@
+check_cmd()
+{
+  if ! which $1 &>/dev/null; then
+    error "$1 command not found, you must install it before."
+  fi
+}
+
+error()
+{
+  echo "Error: $*" >&2
+  exit 1
+}
+
+check_cmd docker
+check_cmd wget
+
+./s/download_video.sh
+./s/cut_smaller_video.sh