docs: add hugo site

Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>

dockerfiles/docs.Dockerfile

@@ -0,0 +1,28 @@
+# syntax=docker/dockerfile:1
+
+ARG GO_VERSION=1.20.8
+ARG ALPINE_VERSION=3.18
+
+FROM golang:${GO_VERSION}-alpine${ALPINE_VERSION} AS base
+RUN apk add --no-cache git
+
+FROM base AS hugo
+ARG HUGO_VERSION=0.119.0
+RUN --mount=type=cache,target=/go/mod/pkg \
+    go install github.com/gohugoio/hugo@v${HUGO_VERSION}
+
+FROM base AS build-base
+COPY --from=hugo $GOPATH/bin/hugo /bin/hugo
+WORKDIR /src
+
+FROM build-base AS build
+RUN --mount=type=bind,rw,source=docs,target=. \
+    hugo --gc --minify --destination /out
+
+FROM build-base AS server
+COPY docs .
+ENTRYPOINT [ "hugo", "server", "--bind", "0.0.0.0" ]
+EXPOSE 1313
+
+FROM scratch AS out
+COPY --from=build /out /