# Build Image for dotNetcore 3.1

**URL:** <https://forums.docker.com/t/build-image-for-dotnetcore-3-1/110115>\
**Category:** Image Builds\
**Tags:** docker, build\
**Created:** [June 4, 2021, 12:40pm UTC](https://forums.docker.com/t/build-image-for-dotnetcore-3-1/110115 "2021-06-04T12:40:26Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![faizanather](https://avatars.discourse-cdn.com/v4/letter/f/a9adbd/32.png) [@faizanather](https://forums.docker.com/u/faizanather)\
**Post date:** [June 4, 2021, 12:40pm UTC](https://forums.docker.com/t/build-image-for-dotnetcore-3-1/110115/1 "2021-06-04T12:40:26Z")

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HI I am trying to create the docker image in my DotNetCoreApp 2.1 with the below docker file

#Depending on the operating system of the host machines(s) that will bu ild or run the containers, the image specified in the FROM statement may need to be changed.  
#For more information, please see https:/ /aka.ms/containercompat

FROM  
WORKDIR /app  
EXPOSE 80  
EXPOSE 443

FROM  
WORKDIR /src  
COPY [“MicroService1.csproj”, “”]  
RUN dotnet restore “/MicroService1.csproj”  
COPY . .  
WORKDIR “/src/”  
RUN dotnet build “MicroService1.csproj” -c Release -o /app

FROM build AS publish  
RUN dotnet publish “MicroService1.csproj” -c Release -o /app

FROM base AS final  
WORKDIR /app  
COPY --from=publish /app .  
ENTRYPOINT [“dotnet”, “MicroService1.dll”]

When i try to build it, it give me below error:

## =\> [internal] load build context 2.5s =\> =\> transferring context: 748.97kB 0.9s =\> [base 1/2] FROM [Microsoft Artifact Registry](http://mcr.microsoft.com/dotnet/core/aspnet:2.1-nanoserver-1809@sha256:3cf20abfee3f21398ff34cf2d8f14fdc649123790cf945cd289aedec61c8ad58) 53.0s =\> =\> resolve [Microsoft Artifact Registry](http://mcr.microsoft.com/dotnet/core/aspnet:2.1-nanoserver-1809@sha256:3cf20abfee3f21398ff34cf2d8f14fdc649123790cf945cd289aedec61c8ad58) 0.4s =\> =\> sha256:3cf20abfee3f21398ff34cf2d8f14fdc649123790cf945cd289aedec61c8ad58 1.75kB / 1.75kB 0.0s =\> =\> sha256:877c122fd459c97829abead33a26417b17acbd922ab7afe05b07e2cec96ab5ac 2.54kB / 2.54kB 0.0s =\> =\> sha256:b9043d31610e0dfa43b1afe286f8918b6e3bf69ece50f44424b29d48f20aa662 101.38MB / 101.38MB 25.4s =\> =\> sha256:6edf5a96c5c0c6448561b857c5fd46c58138c538dab926b72171413fb62480e9 61.91MB / 61.91MB 35.8s =\> =\> sha256:72c59a562e3726965b1cbdb164ad24410b217a9f154fa02d779bfc1f125164ef 824B / 824B 2.6s =\> =\> sha256:801a77eaf0429bcd5f2f1ac3913b63e3bfa7b0c2eb6c3709d02bed3f7aa76e4f 73.19kB / 73.19kB 3.6s =\> =\> sha256:d4b0f3e4da98dd66e69b85ce3522f5b6c50a66cc3a8a9d98f3eb60e0b2751e22 825B / 825B 4.6s =\> =\> sha256:d2e6839152e3e43ff5e9ab5659ae9235b596ad9410a397d240f10760ecb18304 877B / 877B 5.4s =\> =\> extracting sha256:b9043d31610e0dfa43b1afe286f8918b6e3bf69ece50f44424b29d48f20aa662 10.3s =\> =\> extracting sha256:6edf5a96c5c0c6448561b857c5fd46c58138c538dab926b72171413fb62480e9 4.6s =\> =\> extracting sha256:72c59a562e3726965b1cbdb164ad24410b217a9f154fa02d779bfc1f125164ef 0.0s =\> =\> extracting sha256:801a77eaf0429bcd5f2f1ac3913b63e3bfa7b0c2eb6c3709d02bed3f7aa76e4f 0.2s =\> =\> extracting sha256:d4b0f3e4da98dd66e69b85ce3522f5b6c50a66cc3a8a9d98f3eb60e0b2751e22 0.0s =\> =\> extracting sha256:d2e6839152e3e43ff5e9ab5659ae9235b596ad9410a397d240f10760ecb18304 0.0s =\> ERROR [base 2/2] WORKDIR /app 23.7s

> [base 2/2] WORKDIR /app:

* * *

open /var/lib/docker/overlay2/04b92d28651f74826c5b813be8ac3540b46d20f581bd4013b94cf3c920ed6cbf/merged/etc/passwd: no such file or directory

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<div class="post-metadata">

**Author:** ![faizanather](https://avatars.discourse-cdn.com/v4/letter/f/a9adbd/32.png) [@faizanather](https://forums.docker.com/u/faizanather)\
**Post date:** [June 4, 2021, 12:40pm UTC](https://forums.docker.com/t/build-image-for-dotnetcore-3-1/110115/2 "2021-06-04T12:40:56Z")

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i have removed few links as it was not allowing me to post