updated container (first working version)

Dockerfile

@@ -1,6 +1,6 @@
 # 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" \
+LABEL Description="This image is used build and serve jekyll sites" \
       Author="david@socialnerds.org" \
       Version="0.1" \
       License="MIT"
@@ -9,24 +9,25 @@ LABEL Description="This image is used to learn building dockerfiles" \
 ENV JEKYLL_SITE=default
 ENV USER_ID=1000
 ENV GROUP_ID=1000
+ENV USERNAME=jekyll-dev
 
-# expose port for `jekyll serve`
+# expose port for jekyll development webserver
 EXPOSE 4000
 
 # volume definitions
 VOLUME ["/mnt"]
 
-# prepare the baseimage and create 
+# 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 && \
-    groupadd -g $GROUP_ID jekyll-dev && \
-    useradd -u $USER_ID -g $GROUP_ID -M -d /mnt -s /bin/false jekyll-dev
+    groupadd -g $GROUP_ID $USERNAME && \
+    useradd -u $USER_ID -g $GROUP_ID -m -d /home/$USERNAME -s /bin/false $USERNAME
 
-USER jekyll-dev
+# copy jekyll script into the image
+COPY jekyll.sh /opt/jekyll.sh
 
-RUN cd /mnt && \
-    if [ ! -d "/mnt/$JEKYLL_SITE" ]; then jekyll new $JEKYLL_SITE; fi && \
-    cd $JEKYLL_SITE && bundle install
+# set executing user name
+USER $USERNAME
 
-# run command
-CMD bundle exec jekyll serve --host=0.0.0.0 --incremental
+# run jekyll script
+CMD bash /opt/jekyll.sh

README.md

@@ -2,3 +2,34 @@
 
 Simple container to build and serve a jekyll site.
 
+## Use
+
+```bash
+# clone repository
+git clone https://socialg.it/david/jekyll-dev.git
+cd jekyll-dev
+
+# edit to your needs
+vim docker-compose.yml
+
+# build and run container
+docker-compose build
+docker-compose up -d
+```
+
+## Update
+
+```bash
+cd jekyll-dev
+docker-compose pull && docker-compose build
+docker-compose up -d
+```
+
+## Remove
+
+```bash
+cd jekyll-dev
+docker-compose down
+cd ..
+rm -rf jekyll-dev
+```

jekyll.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# set $PATH
+export PATH=$PATH:$HOME/.gem/bin
+
+# create new jekyll site if the destination directory it does not exist
+if [ ! -d "/mnt/$JEKYLL_SITE" ]; then
+  cd /mnt
+  jekyll new $JEKYLL_SITE
+  cd $JEKYLL_SITE
+  bundle install --path $HOME/.gem
+fi
+
+# build and serve
+cd /mnt/$JEKYLL_SITE
+bundle exec jekyll serve --host=0.0.0.0 --incremental