modified README file

README.md

@@ -1 +1,28 @@
-# docker-testapp
+# Docker-testapp
+
+#### Info:
+
+In this app, we are using `MongoDB` for Database, but we haven't set it up.
+
+We are going to set it using `Docker`. For that we gonna need two images :
+	1. mongo
+	2. mongo-express ( a user interface for our mongo database )
+
+***Note: We are NOT seting it up in our system. We are setting it in Docker.** *
+
+***Also, we want both of our containers to interact with each other without any `port` or `limitation`. For which, we are going to use `Docker Network`.
+	`Docker Network` is like an `isolated network area` & Containers inside a specific docker network can interact with each other without any limitations.
+
+---
+
+-> For `mongo` container:
+
+Go to : Docker_testapp\References\images\1770547027322.png
+
+-> For `mongo-express` container:
+
+Go to : Docker_testapp\References\images\1770548213468.png
+
+Note : In the `MONGODB_URL` environment variable, that `mongo` after `@` is the name of our `mongo image's container`.
+
+---

server.js

@@ -15,7 +15,7 @@ app.get("/getUsers", async (req, res) => {
     await client.connect(URL);
     console.log('Connected successfully to server');
 
-    const db = client.db("apnacollege-db");
+    const db = client.db("college-db");
     const data = await db.collection('users').find({}).toArray();
 
     client.close();
@@ -29,11 +29,12 @@ app.post("/addUser", async (req, res) => {
     await client.connect(URL);
     console.log('Connected successfully to server');
 
-    const db = client.db("apnacollege-db");
+    const db = client.db("college-db");
     const data = await db.collection('users').insertOne(userObj);
     console.log(data);
     console.log("data inserted in DB");
     client.close();
+    res.send("User added successfully")
 });