Add (or replace) an entry called "dockermachine" in /etc/hosts that points to your local "docker-machine ip" so you can use http://dockermachine/

add_docker_to_etc_hosts.sh

#!/bin/bash
# Add (or replace) an entry called "dockermachine" in /etc/hosts that points to
# your local "docker-machine ip" so you can use http://dockermachine/
eval $(docker-machine env)
readonly DOCKER_HOST_NAME="dockermachine"
readonly HOSTS_FILE="/etc/hosts"
readonly TMPFILE=$(mktemp)
readonly DOCKER_HOST_IP=$(docker-machine ip)
readonly DOCKER_HOST_ENTRY="$DOCKER_HOST_IP $DOCKER_HOST_NAME"
echo "Adding '$DOCKER_HOST_IP $DOCKER_HOST_NAME' entry to '$HOSTS_FILE' so you can use http://$DOCKER_HOST_NAME URLs for testing"
if grep -q "^[^#]*$DOCKER_HOST_NAME" "$HOSTS_FILE" ; then
  echo "Replacing existing '$DOCKER_HOST_NAME' entry."
  awk "!/^[^#].*$DOCKER_HOST_NAME/ {print \$0}" "$HOSTS_FILE" > "$TMPFILE"
else
  cp $HOSTS_FILE $TMPFILE
fi
echo -e "$DOCKER_HOST_ENTRY" >> "$TMPFILE"
echo "Modifying $HOSTS_FILE requires sudo privileges, please enter your password."
sudo -k sh -c "cat \"$TMPFILE\" > \"$HOSTS_FILE\""