bump dockerfiles (#23)

* bump dockerfiles

* docs +semver: major

.devcontainer/Dockerfile

@@ -1,6 +1,6 @@
 # See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.245.2/containers/dotnet/.devcontainer/base.Dockerfile
 
-ARG VARIANT="7.0-bullseye-slim"
+ARG VARIANT="8.0-bookworm-slim"
 FROM mcr.microsoft.com/vscode/devcontainers/dotnet:0-${VARIANT}
 
 # [Choice] Node.js version: none, lts/*, 18, 16, 14

Dockerfile.singlearch

@@ -1,11 +1,11 @@
-FROM mcr.microsoft.com/dotnet/sdk:7.0 AS build
+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
 WORKDIR /repo
 COPY ["src/multi-arch-container-dotnet/multi-arch-container-dotnet.csproj", "src/multi-arch-container-dotnet/"]
 RUN dotnet restore "src/multi-arch-container-dotnet/multi-arch-container-dotnet.csproj"
 COPY . .
 RUN dotnet publish "src/multi-arch-container-dotnet/multi-arch-container-dotnet.csproj" -c Release -o /app/publish --no-restore
 
-FROM mcr.microsoft.com/dotnet/aspnet:7.0 AS final
+FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS final
 WORKDIR /app
 COPY --from=build /app/publish .
 

README.md

@@ -2,7 +2,7 @@
 
 ## Introduction
 
-I've been developing a service orientated smart home system which consists of a number of containerised workloads running on an edge Kubernetes cluster (via [Microk8s](https://github.com/canonical/microk8s)), the "cluster" itself is a sole Raspberry Pi 4b (ARMv8).
+I've been developing a service orientated smart home system which consists of a number of containerised workloads running on an edge Kubernetes cluster (via [Microk8s](https://github.com/canonical/microk8s)), the "cluster" comprises two Raspberry Pi 4b (ARMv8).
 
 As well as running multiple workloads on the Pi 4b I also run workloads on another Raspberry Pi 2b (ARMv7) which is much older (but very power efficient). And finally I also need to run general tests of the workloads on my local Windows development machine prior to deployment to my "Production cluster", and at a later date I may even want to run these workloads on [Azure Kubernetes Service](https://azure.microsoft.com/en-us/products/kubernetes-service/).