Add Bundler to dockerfile, fix build name

.forgejo/workflows/build-jekyll.yml

@@ -3,7 +3,7 @@ on:
     branches:
       - main
 jobs:
-  test:
+  build_website:
     runs-on: docker
     container:
       image: git.hswro.org/fleg/hswro_org:latest

Dockerfile

@@ -1,7 +1,11 @@
-FROM fedora:41
+FROM ubuntu:22.04
 
-RUN dnf -y upgrade \
- && dnf install -y ruby ruby-devel openssl-devel redhat-rpm-config gcc-c++ @development-tools nodejs git \
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    ruby-full build-essential zlib1g-dev \
+    build-essential \
+    git nodejs git \
+    && rm -rf /var/lib/apt/lists/* \
  && gem install --no-document jekyll -v 4.4.1 \
  && gem install --no-document jekyll-environment-variables \
- && gem install --no-document webrick -v 1.7
+ && gem install --no-document webrick -v 1.7 \
+ && gem install bundler