Add instructions for local deployment

[kabilar]

• Update readme with docker run command for local deployment
• Update gitignore for directories that are created by local deployment

[waxlamp]

This looks good to me overall. Leaving this as a comment rather than an approval so someone with more authority on this repo (I think that's @yarikoptic?) can weigh in.

[yarikoptic]

conflicts amassed

re @waxlamp

so someone with more authority on this repo ...

I guess it was not in a "formal" authority way since you are the owner here too

right? with this I also entitle you to the "informal" authority to provide your feedback/approvals on this repo @waxlamp ;)

[yarikoptic]

running from top directory on Linux I got

❯ docker run --rm -it --volume="$PWD:/srv/jekyll" \
  --volume="$PWD/vendor/bundle:/usr/local/bundle"  \
  --env JEKYLL_ENV=development -p 4000:4000 \
  jekyll/jekyll:4.0.1  jekyll serve --config _config.yml
Unable to find image 'jekyll/jekyll:4.0.1' locally
4.0.1: Pulling from jekyll/jekyll
cbdbe7a5bc2a: Pull complete 
aa8ae8202b42: Pull complete 
b21786fe7c0d: Pull complete 
2e8deee27474: Pull complete 
b84a6ba69f44: Pull complete 
593a81637df6: Pull complete 
Digest: sha256:2500fafd64afad32e40295c23a7054d95be95b2cf5b76b285af2a2149e2d9322
Status: Downloaded newer image for jekyll/jekyll:4.0.1
Could not locate Gemfile

❯ find -iname Gemfile
./Gemfile
find: ‘./.sass-cache’: Permission denied
find: ‘./_site’: Permission denied

[satra]

the docker command needs a working directory flag to be in /srv/jekyll

[satra]

last week github pages wouldn't build because of a bug. it looks like it's been released, and the gemfile should simply contain. this should keep any local dev consistent with github's page build mechanism

gem "github-pages", "=231"

alternatively, one could in the future, switch to actions from pages (https://github.com/sensein/sensein.github.io/blob/main/.github/workflows/pages-build.yml), which i did last week because of the bug. an action also gives more capabilities, like using jekyll 4, if needed.

[satra]

also the Gemfile.lock should be removed and regenerated, based on github-jekyll changes.