Add docker files

Dockerfile

+FROM ros:kinetic-ros-core
+# install ros tutorials packages
+RUN apt-get update && apt-get install -y \
+    ros-kinetic-rosbridge-suite \
+    wget python-smbus python-pip \
+    && rm -rf /var/lib/apt/lists/
+
+RUN pip install adafruit-ads1x15
+
+COPY . /app

docker-compose.yml

+version: '2'
+services:
+  ads1115:
+    build: .
+    devices:
+      - "/dev/i2c-1"
+    depends_on:
+      - web-bridge
+    command: python /app/scripts/ads1115_node.py
+    network_mode: "host"
+    restart: on-failure
+  web-bridge:
+    build: .
+    command: roslaunch rosbridge_server rosbridge_websocket.launch
+    network_mode: "host"
+    restart: on-failure
+