Why should you care?

You care about this when services leave your laptop and run on servers, Kubernetes, or Azure where restarts and scaling happen automatically.

See it live — copy this example

Create a Web API project (dotnet new webapi), paste the code, then run dotnet run.

FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
WORKDIR /src
COPY . .
RUN dotnet publish Order.Api/Order.Api.csproj -c Release -o /app

FROM mcr.microsoft.com/dotnet/aspnet:8.0
WORKDIR /app
COPY --from=build /app .
ENTRYPOINT ["dotnet", "Order.Api.dll"]

Run Example »

This lesson uses terminal or setup steps. Run commands on your computer — the live editor appears on coding lessons.

What happened?

• The example shows Docker Fundamentals wired into Notification Service.
• Read each line, run it locally, then change one setting and observe what breaks or improves.
• That is how teams learn in production too — small experiments, not big bang rewrites.

Try it yourself

1. Ensure Docker Desktop is running.
2. Open or create the ShopNest project area for Notification Service.
3. Apply the Docker Fundamentals pattern from the lesson example.
4. Change a string or route in the example and save — watch Swagger or the RabbitMQ Management UI update.
5. Break the code on purpose (remove a semicolon), read the error message, then fix it.

Remember

Docker Fundamentals connects to Notification Service in ShopNest Cloud-Native. Practice by editing the example yourself — do not only read. Move on when you can explain this topic in your own words without looking.

Real-world: Zoho-style SaaS billing

Billing, tenant provisioning, and feature flags are separate services. A billing fix deploys without redeploying the entire admin UI backend.

Outcome: Multi-tenant isolation and faster team velocity on subscription changes.