introduce docker to resolve issue #9 (#42)

* use docker for testing actively during development 

* ignore docker files while npm build
* renamed docker-compose.json to docker-compose.yml
* set executable permissions

.npmignore

@@ -1,4 +1,6 @@
 /test
 /examples
 .idea
-.jshintrc
+.jshintrc
+docker-compose.json
+docker-entrypoint.sh

docker-compose.yml

@@ -0,0 +1,20 @@
+## Version Selection for compose file
+# https://docs.docker.com/compose/compose-file/#/versioning
+version: '2'
+services:
+  web:
+    image: node:${NODE_VERSION}
+    working_dir: /apps/examples
+    entrypoint: /apps/docker-entrypoint.sh
+    command: node server/server.js
+    environment:
+     DEBUG: boot:test:*
+    ports:
+     - "80:3000"
+    volumes:
+     - .:/apps
+    depends_on:
+     - es
+    restart: always
+  es:
+    image: elasticsearch:${ES_VERSION}

docker-entrypoint.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+# setting up prerequisites
+
+if [ -f server/datasources.bak ]; then
+  cp server/datasources.bak server/datasources.json
+else
+  cp server/datasources.json server/datasources.bak
+fi
+if [ -f server/model-config.bak ]; then
+  cp server/model-config.bak server/model-config.json
+else
+  cp server/model-config.json server/model-config.bak
+fi
+sed -i 's/hosted\.foundcluster\.com/es/g; s/9243/9200/g' /apps/examples/server/datasources.json
+sed -i 's/elasticsearch-ssl/elasticsearch-plain/g' /apps/examples/server/model-config.json
+sed -i '21,41d; s/"requestTimeout": 30000/"requestTimeout": 30000,/' /apps/examples/server/datasources.json
+if [ -d node_modules ]; then
+  rm -rf node_modules
+fi
+npm install
+curl -X POST http://es:9200/shakespeare
+exec "$@"