Create deployment script.

There are several commands that we need to run to deploy the
application. The script makes building and deploying a single command.

deploy.sh

@@ -0,0 +1,55 @@
+#!/bin/sh -x
+#
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script builds and deploys bot to the server.
+# The only argument that needs to be passed is the IP-address of the server.
+# WORDS_TAG env variable can be used to specify tag that will be used to build image.
+
+IP="$1"
+WORDS_TAG="${WORDS_TAG:-words-dev}"
+echo $WORDS_TAG
+
+VOLUME="${WORDS_TAG}-vol"
+IMAGE_PATH="/tmp/${WORDS_TAG}-image.tar"
+
+sudo docker build --build-arg "IP=$IP" -t "$WORDS_TAG" .
+sudo docker save "$WORDS_TAG" -o $IMAGE_PATH
+sudo chmod +r $IMAGE_PATH
+scp $IMAGE_PATH "root@$IP:/tmp/"
+ssh "root@$IP" -- "
+    docker load < $IMAGE_PATH
+    docker volume create $VOLUME
+"
+
+set +x
+echo
+echo "You are about to stop an old version and start a new one. This can be disruptive. Are you sure?"
+echo "Press enter to continue."
+read _
+set -x
+
+APP="${WORDS_TAG}-app"
+
+ssh "root@$IP" <<EOF
+    docker stop $APP
+    docker rm $APP
+    docker run \
+        --restart=on-failure \
+        --name $APP \
+        --mount source=${VOLUME},target=/words-vol/db/ \
+        -p 8443:8443 \
+        $WORDS_TAG --port 8443 --ip $IP
+EOF