initial commit

.gitignore

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+*.swp
+*~

Dockerfile

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+# Dockerfile to build and serve a jekyll site with the development webserver
+FROM ubuntu:focal
+LABEL Description="This image is used to learn building dockerfiles" \
+      Author="david@socialnerds.org" \
+      Version="0.1" \
+      License="MIT"
+
+# environment variables
+ENV JEKYLL_SITE=default
+
+# copy stuff into the image
+COPY jekyll.sh jekyll.sh
+RUN chmod +x jekyll.sh
+
+# expose port for `jekyll serve`
+EXPOSE 4000
+
+# volume definitions
+VOLUME ["/mnt"]
+
+# prepare the baseimage
+RUN apt-get update && apt-get install -y ruby ruby-dev gcc g++ make libssl-dev libreadline-dev && \
+    gem update && gem install jekyll bundler
+
+# run command
+CMD ./jekyll.sh

docker-compose.yml

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+version: "3.0"
+
+services:
+  jekyll:
+    image: jekyll-dev:latest
+    build: .
+    container_name: jekyll-dev
+    volumes:
+      - /home/david/Projects/just-the-docs:/mnt
+    ports: 
+      - 127.0.0.1:4000:4000
+    environment:
+      - JEKYLL_SITE=docs

jekyll.sh

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+#!/bin/bash
+
+# create new or serve existing jekyll page (/mnt/$JEKYLL_SITE)
+
+cd /mnt
+if [ ! -d "/mnt/$JEKYLL_SITE" ]; then
+  jekyll new $JEKYLL_SITE
+fi
+cd $JEKYLL_SITE
+bundle install
+bundle exec jekyll serve --host=0.0.0.0 --incremental