Add support for running as docker container

Dockerfile

@@ -0,0 +1,14 @@
+FROM mcr.microsoft.com/dotnet/sdk:7.0-alpine AS build
+WORKDIR /src
+COPY . ./
+WORKDIR Groceries
+RUN dotnet restore
+RUN dotnet publish --no-restore --output /out
+
+FROM mcr.microsoft.com/dotnet/aspnet:7.0-alpine AS base
+WORKDIR /groceries
+COPY --from=build /out .
+COPY --from=build /src/Groceries/config.ini /config/
+VOLUME /config
+ENV DOTNET_ENABLEDIAGNOSTICS=0
+ENTRYPOINT ["./Groceries", "--data", "/config"]