Fix readme since docker command did not work anymore

Author: Mathias Reichardt

Gemfile.lock

@@ -14,6 +14,7 @@ GEM
     eventmachine (1.2.7)
     ffi (1.17.1-arm64-darwin)
     ffi (1.17.1-x86_64-linux-gnu)
+    ffi (1.17.1-x86_64-linux-musl)
     forwardable-extended (2.6.0)
     google-protobuf (4.29.3-arm64-darwin)
       bigdecimal
@@ -76,9 +77,10 @@ GEM
     rexml (3.4.2)
     rouge (4.5.1)
     safe_yaml (1.0.5)
-    sass-embedded (1.83.4-arm64-darwin)
+    sass-embedded (1.83.4)
       google-protobuf (~> 4.29)
-    sass-embedded (1.83.4-x86_64-linux-gnu)
+      rake (>= 13)
+    sass-embedded (1.83.4-arm64-darwin)
       google-protobuf (~> 4.29)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
@@ -88,6 +90,7 @@ GEM
 PLATFORMS
   arm64-darwin
   x86_64-linux-gnu
+  x86_64-linux-musl
 
 DEPENDENCIES
   jekyll (~> 4.4.1)

README.md

@@ -2,8 +2,8 @@
 
 **Deployed here [https://restyard.github.io/RESTyard-Docs/](https://restyard.github.io/RESTyard-Docs/)**
 
-RUN  build: `docker run --rm --volume="${PWD}:/srv/jekyll:Z" -it jekyll/jekyll:latest /bin/bash -c "bundle install && bundle exec jekyll"`
-Preview: show with `http_server` in _site folder (node tool)
+RUN  build: `docker run --rm --volume="${PWD}:/srv/jekyll:Z" -w /srv/jekyll -it ruby:3.3-slim /bin/bash -c "apt-get update && apt-get install -y build-essential && bundle install && bundle exec jekyll build"`
+Preview: `docker run --rm --volume="${PWD}:/srv/jekyll:Z" -w /srv/jekyll -p 4000:4000 -it ruby:3.3-slim /bin/bash -c "apt-get update && apt-get install -y build-essential && bundle install && bundle exec jekyll serve --host 0.0.0.0 --livereload"`
 
 This is a *bare-minimum* template to create a [Jekyll] site that: