Slight restructure, Containerfile now does npm build properly

Containerfile

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+# Client/frontend build in an isolated stage
+# We use node:latest as the base image.
+# Essentially we build the frontend SPA with vite and 
+# make it available in the public directory.
+FROM docker.io/node:latest as client
+WORKDIR /build
+ADD ./client /build
+RUN npm install
+RUN npm run build
+
+# Builds the server in an isolated stage
+# We use musl to get a truly static binary
+# that runs cleanly without depending on glibc.
+FROM docker.io/rust:latest as builder
+WORKDIR /build
+ADD ./server /build
+RUN apt update
+RUN apt install musl musl-dev musl-tools -y
+RUN rustup target add x86_64-unknown-linux-musl
+RUN cargo build --target x86_64-unknown-linux-musl --release
+
+# Final stage, copy the server binary and the frontend build
+# This stage is the actual container, and is based on alpine
+# a minimal linux distribution resulting in a small image.
+FROM docker.io/alpine:latest as runner
+
+# Add a non-root user for running the server
+RUN addgroup -S user && adduser -S user -G user
+
+WORKDIR /runner
+# Copy the server binary and the public directory
+COPY --from=builder /build/target/x86_64-unknown-linux-musl/release/server /runner/server
+# Copy the frontend SPA build into public
+COPY --from=client /build/dist /runner/public
+
+# Make sure the user can access the files
+RUN chown -R user:user /runner
+USER user
+
+# Run the server
+EXPOSE 8080
+CMD ["./server"]