Static site generator - Hugo

Hugo is a static site generator repo.

1. Create rsa keys repo with content (key, key.pub)
2. Create dockerfile

   FROM alpine AS build
   
   RUN apk add --update \
       wget \
       git \
       openssh
   
   ARG BASE_URL="https://example.com"
   ARG HUGO_VERSION="0.152.2"
   ARG PLATFORM="Linux-ARM64"
   
   RUN wget --quiet "https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_${HUGO_VERSION}_${PLATFORM}.tar.gz" && \
       tar xzf hugo_${HUGO_VERSION}_${PLATFORM}.tar.gz && \
       rm -r hugo_${HUGO_VERSION}_${PLATFORM}.tar.gz && \
       mv hugo /usr/bin
   
   COPY key .
   
   # hack to avoid caching of git clone
   ADD "https://www.random.org/cgi-bin/randbyte?nbytes=10&format=h" skipcache
   
   RUN eval $(ssh-agent) && \
       ssh-add key && \
       ssh-keyscan -H <REPO_DOMAIN> >> /etc/ssh/ssh_known_hosts && \
       git clone --branch master --single-branch --no-tags git@<REPO_DOMAIN>:blog.git
   
   WORKDIR /blog/blog
   RUN git branch
   RUN sed -i 's~<BASE_URL>~'${BASE_URL}'~g' config.toml
   
   RUN hugo --minify
   
   # uncomment to debug
   #RUN sleep 1h
   
   # serve previously build static page
   FROM httpd:alpine
   
   WORKDIR /usr/local/apache2/htdocs
   
   COPY --from=build /blog/blog/public .
   

3. Create docker-compose.yml

   services:
       blog:
           build: 
               context: .
               args:
                   BASE_URL: "https://blog.${DOMAIN}"
           restart: "always"
           networks: ["server"]
           labels:
               - "traefik.enable=true"
               - "traefik.http.routers.blog.rule=Host(`blog.${DOMAIN}`)"
   
   networks:
       server:
       external: true