react-express-mongodb: rename server to backend

The goal here is to keep the same structure than the other examples.
Also, considering that it has a "frontend" folder, the equivalent for
the server should be "backend".

Signed-off-by: Jérémie Drouet <jeremie.drouet@gmail.com>

react-express-mongodb/backend/package.json

@@ -0,0 +1,27 @@
+{
+  "name": "docker_node_mongo_starter",
+  "version": "1.0.0",
+  "description": "docker starter with node js and mongodb services",
+  "main": "index.js",
+  "scripts": {
+    "start": "node server.js",
+    "dev": "nodemon server.js"
+  },
+  "author": "Syed Afzal",
+  "license": "ISC",
+  "dependencies": {
+    "bcryptjs": "^2.4.3",
+    "body-parser": "^1.18.2",
+    "cookie-parser": "^1.4.4",
+    "cors": "^2.8.4",
+    "express": "^4.17.1",
+    "lodash": "^4.17.13",
+    "mongodb": "^3.0.7",
+    "mongoose": "^5.0.15",
+    "simple-node-logger": "^18.12.23",
+    "validator": "^10.1.0"
+  },
+  "devDependencies": {
+    "nodemon": "^2.0.3"
+  }
+}