Updated to minimal supported ruby version

Author: sweisgerber-dev

Dockerfile

@@ -1,17 +1,24 @@
-FROM ruby:2.6-stretch
+FROM ruby:2-slim-bullseye
 
-MAINTAINER Sebastian Weisgerber <weisgerber@cispa.saarland>
+MAINTAINER Sebastian Weisgerber <weisgerber@cispa.de>
+
+ARG DEBIAN_FRONTEND="noninteractive"
 
 # otherwise can see some encoding issues:
 # https://oncletom.io/2015/docker-encoding/
 ENV LANG=C.UTF-8
-
-RUN apt-get update
-RUN  curl -sL http://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add - &&\
-     echo "deb http://deb.nodesource.com/node_8.x stretch main" > /etc/apt/sources.list.d/nodesource.list &&\
-     echo "deb-src http://deb.nodesource.com/node_8.x stretch main" >> /etc/apt/sources.list.d/nodesource.list
-RUN apt-get update
-RUN apt-get install -y \
+ENV RACK_ENV="production" \
+    RAILS_ENV="production"
+# environment settings
+RUN apt-get update \
+ && apt-get install -y \
+            build-essential \
+            curl \
+ && curl -sL http://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add - \
+ && echo "deb http://deb.nodesource.com/node_18.x bullseye main" > /etc/apt/sources.list.d/nodesource.list \
+ && echo "deb-src http://deb.nodesource.com/node_18.x bullseye main" >> /etc/apt/sources.list.d/nodesource.list \
+ && apt-get update \
+ && apt-get install -y \
             build-essential \
             curl \
             lftp \
@@ -22,13 +29,7 @@ RUN apt-get install -y \
             imagemagick \
             python3 \
             virtualenv \
-            python-pip \
             python3-pip \
-            nodejs \
-            npm
-RUN rm -f /usr/bin/python && ln -s /usr/bin/python3.5 /usr/bin/python
-
-ENV RACK_ENV="production" \
-    RAILS_ENV="production"
+            nodejs
 
 CMD [ "irb" ]

build.sh

@@ -1,2 +1,2 @@
 #!/usr/bin/env bash
-docker build -t rubyll:latest .
+docker buildx build ./ -t rubyll:latest