Dockerfile for Raspberry Pi 3b sample

Dockerfile

FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:8.0-preview-alpine AS build
ARG TARGETARCH
WORKDIR /source

# copy csproj and restore as distinct layers
COPY Fritz.DemoPi/*.csproj .
RUN dotnet restore -a $TARGETARCH

# copy everything else and build app
COPY Fritz.DemoPi/. .
COPY .git/. .git/.
RUN dotnet publish -a $TARGETARCH --no-restore -o /app


# final stage/image
# .NET 8 tag includes `-preview`
FROM mcr.microsoft.com/dotnet/aspnet:8.0-preview-alpine

# These ENVs are only needed because the sample uses .NET 7
ENV DOTNET_ROLL_FORWARD=Major
ENV DOTNET_ROLL_FORWARD_PRE_RELEASE=1

WORKDIR /app
COPY --from=build /app .

USER $APP_UID
ENTRYPOINT ["./Fritz.DemoPi"]