Now things are not that easy to understand here somethings are done a…

…nd can relate this to things that I have done earlier in my journey to Programming as a Computer Science student

.devcontainer/Dockerfile

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+FROM mcr.microsoft.com/devcontainers/javascript-node:1-22-bookworm
+
+# Install MongoDB command line tools - though mongo-database-tools not available on arm64
+ARG MONGO_TOOLS_VERSION=6.0
+RUN . /etc/os-release \
+    && curl -sSL "https://www.mongodb.org/static/pgp/server-${MONGO_TOOLS_VERSION}.asc" | gpg --dearmor > /usr/share/keyrings/mongodb-archive-keyring.gpg \
+    && echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/mongodb-archive-keyring.gpg] http://repo.mongodb.org/apt/debian ${VERSION_CODENAME}/mongodb-org/${MONGO_TOOLS_VERSION} main" | tee /etc/apt/sources.list.d/mongodb-org-${MONGO_TOOLS_VERSION}.list \
+    && apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get install -y mongodb-mongosh \
+    && if [ "$(dpkg --print-architecture)" = "amd64" ]; then apt-get install -y mongodb-database-tools; fi \
+    && apt-get clean -y && rm -rf /var/lib/apt/lists/*
+
+# [Optional] Uncomment this section to install additional OS packages.
+# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>
+
+# [Optional] Uncomment if you want to install an additional version of node using nvm
+# ARG EXTRA_NODE_VERSION=10
+# RUN su node -c "source /usr/local/share/nvm/nvm.sh && nvm install ${EXTRA_NODE_VERSION}"
+
+# [Optional] Uncomment if you want to install more global node modules
+# RUN su node -c "npm install -g <your-package-list-here>"
+
+
+

.devcontainer/devcontainer.json

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+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/javascript-node-mongo
+{
+	"name": "Node.js & Mongo DB",
+	"dockerComposeFile": "docker-compose.yml",
+	"service": "app",
+	"workspaceFolder": "/workspaces/${localWorkspaceFolderBasename}",
+
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	// "features": {},
+
+	// Configure tool-specific properties.
+	"customizations": {
+		// Configure properties specific to VS Code.
+		"vscode": {
+			// Add the IDs of extensions you want installed when the container is created.
+			"extensions": [
+				"mongodb.mongodb-vscode"
+			]
+		}
+	}
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	"forwardPorts": [3000]
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "yarn install",
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+}

.devcontainer/docker-compose.yml

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+version: '3.8'
+
+services:
+  app:
+    build: 
+      context: .
+      dockerfile: Dockerfile
+    volumes:
+      - ../..:/workspaces:cached
+
+    # Overrides default command so things don't shut down after the process ends.
+    command: sleep infinity
+
+    # Runs app on the same network as the database container, allows "forwardPorts" in devcontainer.json function.
+    network_mode: service:db
+
+    # Use "forwardPorts" in **devcontainer.json** to forward an app port locally. 
+    # (Adding the "ports" property to this file will not forward from a Codespace.)
+
+  db:
+    image: mongo:latest
+    restart: unless-stopped
+    volumes:
+      - mongodb-data:/data/db
+
+    # Uncomment to change startup options
+    # environment:
+    #  MONGO_INITDB_ROOT_USERNAME: root
+    #  MONGO_INITDB_ROOT_PASSWORD: example
+    #  MONGO_INITDB_DATABASE: your-database-here
+
+    # Add "forwardPorts": ["27017"] to **devcontainer.json** to forward MongoDB locally.
+    # (Adding the "ports" property to this file will not forward from a Codespace.)
+
+volumes:
+  mongodb-data:

.github/dependabot.yml

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+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for more information:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+# https://containers.dev/guide/dependabot
+
+version: 2
+updates:
+ - package-ecosystem: "devcontainers"
+   directory: "/"
+   schedule:
+     interval: weekly

index.js

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+const express = require("express")
+const mongoose = require("mongoose")
+
+const app = express()
+
+const port = 3000
+
+mongoose.connect('mongodb/Localhost:27017/test-db', {
+    useNewUrlParser: true,
+    useUnifiedTopology: true
+})
+.then(()=>{
+    console.log("Connected To MongoDb")
+})
+.catch((error)=>{
+    console.log("Error While Connecting To DataBase: ", error)
+})
+
+app.listen(port, ()=>{
+    console.log(`Server running on port ${port}`)
+})
+
+app.get('/hello', (req, res)=>{
+    res.json({message: "Don't Know how this one is working but can relate to the thingi done in the Computer Networks Lab!!!!"})
+})