Add self contained runtime deployment

AS1024.GeoFeed/Dockerfile.alpine-selfcontained

@@ -0,0 +1,54 @@
+#See https://aka.ms/customizecontainer to learn how to customize your debug container and how Visual Studio uses this Dockerfile to build your images for faster debugging.
+
+FROM alpine:latest AS base
+ENV \
+    # UID of the non-root user 'app'
+    APP_UID=1654 \
+    # Configure web servers to bind to port 8080 when present
+    ASPNETCORE_HTTP_PORTS=8080 \
+    # Enable detection of running in a container
+    DOTNET_RUNNING_IN_CONTAINER=true \
+    # Set the invariant mode since ICU package isn't included (see https://github.com/dotnet/announcements/issues/20)
+    DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=true
+
+RUN apk add --upgrade --no-cache \
+        ca-certificates-bundle \
+        \
+        # .NET dependencies
+        libgcc \
+        libssl3 \
+        libstdc++ \
+        zlib
+
+# Create a non-root user and group
+RUN addgroup \
+        --gid=$APP_UID \
+        app \
+    && adduser \
+        --uid=$APP_UID \
+        --ingroup=app \
+        --disabled-password \
+        app
+WORKDIR /app
+USER app
+EXPOSE 8080
+
+FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:8.0-alpine AS build
+ARG BUILD_CONFIGURATION=Release
+ARG TARGETARCH
+WORKDIR /src
+COPY ["AS1024.GeoFeed/AS1024.GeoFeed.csproj", "AS1024.GeoFeed/"]
+RUN dotnet restore "./AS1024.GeoFeed/./AS1024.GeoFeed.csproj" -a $TARGETARCH
+COPY . .
+WORKDIR "/src/AS1024.GeoFeed"
+RUN dotnet build "./AS1024.GeoFeed.csproj" -c $BUILD_CONFIGURATION -o /app/build -a $TARGETARCH /p:StaticLink=true
+
+FROM --platform=$BUILDPLATFORM build AS publish
+ARG BUILD_CONFIGURATION=Release
+ARG TARGETARCH
+RUN dotnet publish "./AS1024.GeoFeed.csproj" -c $BUILD_CONFIGURATION -o /app/publish -a $TARGETARCH --self-contained
+
+FROM base AS final
+WORKDIR /app
+COPY --from=publish /app/publish .
+ENTRYPOINT ["/app/AS1024.GeoFeed"]