How to Containerize ASP.NET Core Web API 9 with Docker | Create Docker Image | Step-by-Step Guide

In this tutorial, you’ll learn how to containerize your ASP.NET Core Web API (.NET 9) using Docker from scratch. We’ll walk through the complete process using command line and Docker Desktop, including how to avoid common issues. 🔹 Perfect for developers who want to containerize .NET projects without relying on Visual Studio’s built-in Docker support 🔹 Learn what Docker is, how containers work, and how to test your API with Postman Docker Commands Used 1-docker build -t efcorecodefirstdemo . 2-docker run -d -p 8080:8080 --name alltest efcorecodefirstdemo ⏱ Timestamps: 00:00 – Introduction 00:28 – What is Docker, Image, and Container 02:10 – Prerequisites 02:45 – Writing Dockerfile 04:00 – Explanation of each Dockerfile line 06:40 – Building Docker Image via Command Line 07:10 – Running Container via Command Line 07:40 – Running API via Docker Desktop 08:05 – Testing Container Web API with Postman 09:45 – Conclusion What You’ll Learn: 🔹 What is Docker, Image, and Container 🔹 How to use Container in Docker Desktop 🔹 Use host.docker.internal for DB connections 🔹 Why we use aspnet:9.0 and sdk:9.0 images 🔹 How to build and run Docker containers via CLI 🔹 How to run from Docker Desktop GUI 🔹 Testing your API using Postman 📌 Tools Used:  • ASP.NET Core Web API 9  • Docker Desktop (Linux containers)  • Command Prompt  • Visual Studio 2022  • Postman 📚 Watch My Other Tutorials: 📹 Containerize .NET Core 9 Web API with SQL Server using Docker Compose | Step by Step Tutorial 🔗    • Docker Compose | Containerize .NET Core 9 ...   📹 How to Deploy .NET Core 9 Web API to Kubernetes Locally Using Docker | Kubernetes + Docker Tutorial 🔗    • How to Deploy .NET Core 9 Web API to Kuber...   📹 JWT Authentication in .NET 9 Web API | Access & Refresh Tokens | Complete API Testing using Postman 🔗    • JWT Authentication in .NET 9 Web API | Acc...   📹 Global Exception Handling in ASP.NET Core 9 Web API using IExceptionHandler | Step-by-Step Tutorial 🔗   • Global Exception Handling in ASP.NET Core ...   📹 Multifield Dialog with Sling Model in AEM | AEM Component Development | AEM Tutorial#3 🔗    • Multifield Dialog with Sling Model in AEM ...   📹 Build a New AEM Component from Scratch | Create AEM Component | AEM Tutorial#2 🔗    • Build a New AEM Component from Scratch | C...   📹 .NET 9 Core Web API & EF Core Code First | Complete Tutorial | EF Migration 🔗    • .NET 9 Core Web API & EF Core Code First |...   📹 How to Create a Setup .exe in Visual Studio 2022 Step by Step | Installer for C# Windows Forms 🔗    • How to Create a Setup .exe in Visual Studi...   📹 How to Use Swagger in .NET 9 | Install Swagger in .Net 9 | Step-by-Step Guide 🔗    • How to Use Swagger in .NET 9 | Install Swa...   📹 Top 8 SQL Server Query Optimization Tips | SQL Interview Tips 🔗    • 8 SQL Server Query Optimization Tips | SQL...   📹 How to Bulk Insert CSV Data into SQL Server Database Table | Step-by-Step Tutorial 🔗    • How to Bulk Insert CSV Data into SQL Serve...   📹 Understand SQL Window Functions with Real-World Examples | SQL Window Function | Top Interview Qs 🔗    • Understand SQL Window Functions with Real-...   📹 How to Create and Execute an SSIS Package in Visual Studio 2022 | Step-by-Step Tutorial 🔗    • How to Create and Execute an SSIS Package ...   📹 Top 15 SQL Server Interview Queries | Popular SQL Queries for SQL Interview | Database Queries 🔗    • Top 15 SQL Server Interview Questions | Po...   📹 8 SQL Server Query Optimization Tips | SQL Interview Tips 🔗    • 8 SQL Server Query Optimization Tips | SQL...   📹 Understanding Java Stream API with Examples 🔗    • Understanding Java Stream API with Examples   📹 Cursor AI Tutorial for Beginners | AI Code Editor 🔗    • Cursor AI Tutorial for Beginners | AI Code...   💬 If this helped, please: 👍 Like | 💬 Comment | 🔔 Subscribe | 📢 Share 👉 Subscribe for more .NET + Docker content:    / @codecanvaswithtouseef   ✨ Keep learning with Code Canvas with Tauseef. #Docker #DotNet9 #WebAPI #ASPNETCore #Containerization #DevOps #Postman #hostdockerinternal #LinuxContainers #VisualStudio