## `source` is used to generate the static HTML with Hugo
FROM debian:11 as source

# Install dependencies
ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get update && \
    apt-get install -y imagemagick ca-certificates git wget

# Install Hugo
ENV HUGO_VERSION 0.111.2
RUN wget https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_extended_${HUGO_VERSION}_Linux-64bit.tar.gz && \
    tar -xvf hugo_extended_${HUGO_VERSION}_Linux-64bit.tar.gz && \
    mv hugo /usr/local/bin/hugo && \
    chmod +x /usr/local/bin/hugo

# Copy site source
WORKDIR /src
COPY . ./

# Initialize submodules, like themes
RUN git submodule update --init --recursive

# Generate the site into /src/public
RUN /usr/local/bin/hugo

# Mogrify all images to be more efficient for the web
RUN find ./public -name '*.jpg' -exec mogrify -auto-orient -monitor -sampling-factor 4:2:0 -strip -interlace JPEG -colorspace sRGB -resize 2048 -compress JPEG -quality 80 {} \;

## Create the final image with Nginx serving the static site
FROM nginx:1-alpine
COPY --from=source /src/public /usr/share/nginx/html