epic: first try at adding a backend

Kemkas.Web/Dockerfile

@@ -0,0 +1,27 @@
+FROM mcr.microsoft.com/dotnet/aspnet:7.0 AS base
+WORKDIR /app
+EXPOSE 80
+EXPOSE 443
+
+FROM mcr.microsoft.com/dotnet/sdk:7.0 AS build
+
+# Install Node.js
+RUN curl -fsSL https://deb.nodesource.com/setup_18.x | bash - \
+    && apt-get install -y nodejs \
+    && npm install --global yarn \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /src
+COPY ["Kemkas.Web/Kemkas.Web.csproj", "Kemkas.Web/"]
+RUN dotnet restore "Kemkas.Web/Kemkas.Web.csproj"
+COPY . .
+WORKDIR "/src/Kemkas.Web"
+RUN dotnet build "Kemkas.Web.csproj" -c Release -o /app/build
+
+FROM build AS publish
+RUN dotnet publish "Kemkas.Web.csproj" -c Release -o /app/publish /p:UseAppHost=false
+
+FROM base AS final
+WORKDIR /app
+COPY --from=publish /app/publish .
+ENTRYPOINT ["dotnet", "Kemkas.Web.dll"]