[SOLVED] asp.net core store images wwwroot docker

asp.net core store images wwwroot docker

I have a .net 6 web api.

When a user upload an image it should store in wwwroot folder.

when i run docker i have this error from the backend:

backend    | Unhandled exception. System.IO.DirectoryNotFoundException: /wwwroot\images/
backend    |    at Microsoft.Extensions.FileProviders.PhysicalFileProvider..ctor(String root, ExclusionFilters filters)
backend    |    at Microsoft.Extensions.FileProviders.PhysicalFileProvider..ctor(String root)
backend    |    at Program.<Main>$(String[] args) in /RealEstateAPI/Program.cs:line 65
backend exited with code 139

This is my Docker file:

FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base
WORKDIR /
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
WORKDIR /
COPY RealEstateAPI/appsettings.json ./RealEstateAPI/AppSettings.json
COPY RealEstateAPI/appsettings.Development.json ./RealEstateAPI/AppSettings.Development.json
COPY RealEstateAPI/wwwroot ./RealEstateAPI/
COPY . .

RUN dotnet restore "RealEstateAPI/RealEstateAPI.csproj"
COPY . .
WORKDIR "/RealEstateAPI"
RUN dotnet build "RealEstateAPI.csproj" -c Release -o /build

FROM build AS publish
RUN dotnet publish "RealEstateAPI.csproj" -c Release -o /publish

FROM base AS final
WORKDIR /
COPY --from=publish /publish .
ENTRYPOINT ["dotnet", "RealEstateAPI.dll"]

How can i create a wwwRoot volume and store there images that users are uploading at run time?

the volume will be in Heroku and because the docker image will be there as well

Solution

The filesystems are ephemeral in Heroku. Uploads to disk will only be temporary. You should upload to a cloud storage system (azure blobs, AWS S3, etc) and save the URLs in a database somewhere.