guides: update dotnet (#24810)

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## Description

Tested and updated the dotnet guide.
 - Add missing stage name for dhi Dockerfile
 - Clean up some output

## Related issues or tickets

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## Reviews

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- [ ] Editorial review

Signed-off-by: Craig Osterhout <craig.osterhout@docker.com>

Author: craig-osterhout

content/guides/dotnet/containerize.md

@@ -95,7 +95,7 @@ WORKDIR /source/src
 RUN --mount=type=cache,id=nuget,target=/root/.nuget/packages \
     dotnet publish -a ${TARGETARCH/amd64/x64} --use-current-runtime --self-contained false -o /app
 
-FROM dhi.io/aspnetcore:10
+FROM dhi.io/aspnetcore:10 AS final
 WORKDIR /app
 COPY --from=build /app .
 ENTRYPOINT ["dotnet", "myWebApp.dll"]

content/guides/dotnet/develop.md

@@ -182,9 +182,9 @@ $ docker container ls
 You should see output like the following.
 
 ```console
-CONTAINER ID   IMAGE                  COMMAND                  CREATED              STATUS                        PORTS                    NAMES
-cb36e310aa7e   docker-dotnet-server   "dotnet myWebApp.dll"    About a minute ago   Up About a minute             0.0.0.0:8080->8080/tcp   docker-dotnet-server-1
-39fdcf0aff7b   postgres               "docker-entrypoint.s…"   About a minute ago   Up About a minute (healthy)   5432/tcp                 docker-dotnet-db-1
+CONTAINER ID   IMAGE                         COMMAND                  CREATED              STATUS                        PORTS                    NAMES
+cb36e310aa7e   docker-dotnet-sample-server   "dotnet myWebApp.dll"    About a minute ago   Up About a minute             0.0.0.0:8080->8080/tcp   docker-dotnet-sample-server-1
+39fdcf0aff7b   postgres:18                   "docker-entrypoint.s…"   About a minute ago   Up About a minute (healthy)   5432/tcp                 docker-dotnet-sample-db-1
 ```
 
 In the previous example, the container ID is `39fdcf0aff7b`. Run the following command to connect to the postgres database in the container. Replace the container ID with your own container ID.
@@ -213,7 +213,7 @@ example=# exit
 
 ## Verify that data persists in the database
 
-Open a browser and view the application at [http://localhost:8080](http://localhost:8080). You should see a simple web application with the text `Student name is Whale Moby`.
+Open a browser and view the application at [http://localhost:8080](http://localhost:8080). You should see a simple web application with the text `Student name is Moby Whale`.
 
 Press `ctrl+c` in the terminal to stop your application.
 
@@ -322,7 +322,7 @@ COPY . /source
 WORKDIR /source/src
 CMD dotnet run --no-launch-profile
 
-FROM dhi.io/aspnetcore:10
+FROM dhi.io/aspnetcore:10 AS final
 WORKDIR /app
 COPY --from=build /app .
 ENTRYPOINT ["dotnet", "myWebApp.dll"]

content/guides/dotnet/run-tests.md

@@ -66,7 +66,7 @@ COPY . /source
 WORKDIR /source/src
 CMD dotnet run --no-launch-profile
 
-FROM dhi.io/aspnetcore:10
+FROM dhi.io/aspnetcore:10 AS final
 WORKDIR /app
 COPY --from=build /app .
 ENTRYPOINT ["dotnet", "myWebApp.dll"]