Add Dockerfile

Dockerfile

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+FROM golang:1.20 as build
+
+WORKDIR /app
+
+RUN go install -tags extended github.com/gohugoio/hugo@latest
+COPY . /app
+
+RUN hugo mod get -u && \
+    hugo
+
+FROM nginx:stable-alpine
+
+COPY --from=build /app/public /usr/share/nginx/html/