timbru31 · timbru31 · Apr 28, 2026
diff --git a/.github/workflows/buildx.yml b/.github/workflows/buildx.yml
@@ -15,7 +15,7 @@ jobs:
       fail-fast: false
       matrix:
         ruby-version: ["3.2", "3.3", "3.4", "4.0"]
-        node-version: [20, 22, 24]
+        node-version: [22, 24]
         variant: [default, slim, alpine]
         include:
           - variant: default
@@ -32,7 +32,6 @@ jobs:
         id: nodename
         run: |
           case "${{ matrix.node-version }}" in
-            "20") echo "codename=iron" >> $GITHUB_OUTPUT ;;
             "22") echo "codename=jod" >> $GITHUB_OUTPUT ;;
             "24") echo "codename=krypton" >> $GITHUB_OUTPUT ;;
             "26") echo "codename=lithium" >> $GITHUB_OUTPUT ;;

diff --git a/.github/workflows/dockerimage.yml b/.github/workflows/dockerimage.yml
@@ -14,7 +14,7 @@ jobs:
       fail-fast: false
       matrix:
         ruby-version: ["3.2", "3.3", "3.4", "4.0"]
-        node-version: [20, 22, 24]
+        node-version: [22, 24]
         variant: [default, slim, alpine]
 
     steps:

diff --git a/3.2/20/Dockerfile b/3.2/20/Dockerfile
diff --git a/3.2/20/alpine/Dockerfile b/3.2/20/alpine/Dockerfile
diff --git a/3.2/20/slim/Dockerfile b/3.2/20/slim/Dockerfile
diff --git a/3.3/20/Dockerfile b/3.3/20/Dockerfile
diff --git a/3.3/20/alpine/Dockerfile b/3.3/20/alpine/Dockerfile
diff --git a/3.3/20/slim/Dockerfile b/3.3/20/slim/Dockerfile
diff --git a/3.4/20/Dockerfile b/3.4/20/Dockerfile
diff --git a/3.4/20/alpine/Dockerfile b/3.4/20/alpine/Dockerfile
diff --git a/3.4/20/slim/Dockerfile b/3.4/20/slim/Dockerfile
diff --git a/4.0/20/Dockerfile b/4.0/20/Dockerfile
diff --git a/4.0/20/alpine/Dockerfile b/4.0/20/alpine/Dockerfile
diff --git a/4.0/20/slim/Dockerfile b/4.0/20/slim/Dockerfile
diff --git a/README.md b/README.md
@@ -1,15 +1,15 @@
-# Ruby 3.2, 3.3, 3.4, 4.0 with Node.js 20 LTS, Node.js 22 LTS or Node.js 24 LTS Dockerfile
+# Ruby 3.2, 3.3, 3.4, 4.0 with Node.js 22 LTS or Node.js 24 LTS Dockerfile
 
 [![Docker Automated build](https://img.shields.io/docker/automated/timbru31/ruby-node.svg)](https://hub.docker.com/r/timbru31/ruby-node/)
 [![buildx Status](https://github.com/timbru31/docker-ruby-node/workflows/buildx/badge.svg)](https://github.com/timbru31/docker-ruby-node/actions?query=workflow%3Abuildx)
 [![Lint Dockerfiles](https://github.com/timbru31/docker-ruby-node/workflows/Lint%20Dockerfiles/badge.svg)](https://github.com/timbru31/docker-ruby-node/actions?query=workflow%3A%22Lint+Dockerfiles%22)
 
-A minimal Dockerfile based on Ruby (3.2, 3.3, 3.4 or 4.0) Dockerfile (regular, slim or alpine) with Node.js 20 LTS (Iron), Node.js 22 LTS (Jod) or Node.js 24 LTS (Krypton) installed.
+A minimal Dockerfile based on Ruby (3.2, 3.3, 3.4 or 4.0) Dockerfile (regular, slim or alpine) with Node.js 22 LTS (Jod) or Node.js 24 LTS (Krypton) installed.
 
 ## What's included
 
 - Ruby 3.2, 3.3, 3.4, 4.0
-- Node.js 20 LTS (Iron), Node.js 22 LTS (Jod) or Node.js 24 LTS (Krypton)
+- Node.js 22 LTS (Jod) or Node.js 24 LTS (Krypton)
 - bundled npm that comes with the respective Node.js version (latest for Node.js LTS on alpine, see [why](https://gitlab.alpinelinux.org/alpine/aports/-/commit/25b10bd1a93e12a7e49fee38b0a229281ae49fb7))
 - yarn