Improve docker-compose build and run

On branch master

Changes to be committed:
	modified:   README.md
	new file:   api/.dockerignore
	new file:   api/.env
	new file:   api/.env_docker
	modified:   api/.gitignore
	modified:   api/Dockerfile
	modified:   api/app/queries.js
	new file:   api/package-lock.json
	modified:   api/package.json
	modified:   api/server.js
	modified:   docker-compose.yml
	modified:   mongodb/Dockerfile

README.md

-configure and run MongoDB 3.4 with dump:
+build and run MongoDB and Node.js API with `orders.json` dump:
 ```
-docker-compose build
-docker-compose up -d
+docker-compose up --build -d
 ```
 
-use mongodb:
+use mongodb (mongo shell):
 ```
 docker-compose exec mongo-orders mongo admin
 ```
@@ -17,4 +16,4 @@ show collections;
 db.orders.find();
 ```
 
-Open api at http://localhost:8080/
+API in Node.js available, example route http://localhost:8080/by-customer-pseudo/A**D

api/.dockerignore

+.gitignore
\ No newline at end of file

api/.env

+PORT=3000
+DB_URL=mongodb://localhost:27017
+DB_NAME=order
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api/.env_docker

+PORT=8080
+DB_URL=mongodb://mongo-orders:27017
+DB_NAME=order
\ No newline at end of file

api/.gitignore

-node_modules
-package-lock.json
\ No newline at end of file
+node_modules
\ No newline at end of file

api/Dockerfile

-FROM node:11
+FROM node:11-alpine
 WORKDIR /home/nodejs/app
 COPY . .
+COPY .env_docker .env
 RUN npm install --production
-CMD ["npm", "start"]
+CMD npm start

api/app/queries.js

+require('dotenv').config();
 const u = require('./utils');
 const MongoClient = require('mongodb').MongoClient;
 
-const url = 'mongodb://mongo-orders:27017';
-const dbName = 'order';
+const url = process.env.DB_URL;
+const dbName = process.env.DB_NAME;
 
 let db;
 MongoClient.connect(url, function(err, client) {
@@ -10,7 +11,7 @@ MongoClient.connect(url, function(err, client) {
         console.log(err);
     }
     else {
-        console.log('Connected successfully to server');
+        console.log('Connected successfully to db at "' + url + '/' + dbName + '"');
         db = client.db(dbName);
     }
 });

api/package.json

@@ -21,6 +21,7 @@
   "license": "ISC",
   "dependencies": {
     "body-parser": "^1.19.0",
+    "dotenv": "^8.0.0",
     "express": "^4.17.0",
     "mongodb": "^3.2.5"
   },

api/server.js

 // modules
+require('dotenv').config();
 const express = require('express');
 const app = express();
 const bodyParser = require('body-parser');

docker-compose.yml

-version: "2"
+version: '2'
 services:
     mongo-orders:
         image: mongo
         ports:
-            - "27017:27017"
-        depends_on:
-            - mongo-seed
+            - '27017:27017'
     mongo-seed:
         build: ./mongodb
+        depends_on:
+            - mongo-orders
     api:
         build: ./api
         ports:
-            - "8080:8080"
+            - '8080:8080'
         depends_on:
             - mongo-orders

mongodb/Dockerfile

-FROM mongo
+FROM mongo:latest
 COPY ./data/orders.json /orders.json
-CMD mongoimport --host mongo-orders --db order --collection orders --type json --file orders.json --jsonArray && mongo --host mongo-orders order --eval 'db.orders.find( { "customer.id.floatApprox": { $exists: true } } ).forEach( tr => db.orders.update({_id: tr._id},{$set:{"customer.id": tr.customer.id.floatApprox}}  ) )' && mongo --host mongo-orders order --eval 'db.orders.find().forEach( tr => db.orders.update({_id: tr._id}, {$set:{"shipping.when": new Date(tr.shipping.when)}}))'
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+CMD mongo --host mongo-orders order --eval 'db.dropDatabase()' && mongoimport --host mongo-orders --db order --collection orders --type json --file orders.json --jsonArray && mongo --host mongo-orders order --eval 'db.orders.find( { "customer.id.floatApprox": { $exists: true } } ).forEach( tr => db.orders.update({_id: tr._id},{$set:{"customer.id": tr.customer.id.floatApprox}}  ) )' && mongo --host mongo-orders order --eval 'db.orders.find().forEach( tr => db.orders.update({_id: tr._id}, {$set:{"shipping.when": new Date(tr.shipping.when)}}))'
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