add image build

.editorconfig

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+root = true
+
+[*]
+charset=utf-8
+end_of_line=lf
+trim_trailing_whitespace=true
+insert_final_newline = true
+indent_style=space
+indent_size=2
+
+[*.{yaml,yml}]
+indent_style = space
+indent_size = 2
+
+[Makefile]
+indent_style = tab
+
+[Dockerfile]
+indent_style = space

.gitea/workflows/docker-build.yml

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+name: Docker Build
+
+on: push
+
+env:
+  ACTIONS_STEP_DEBUG: "true"
+
+jobs:
+  docker-build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: https://gitea.dhswt.de/actions/docker-fix-socket-perm@master
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - uses: https://gitea.dhswt.de/actions/docker@master
+        with:
+          ci_registry_password: ${{ secrets.RELEASE_TOKEN }}
+          docker_multiarch: true
+          docker_context_dir: image/

.gitignore

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+**/.idea/
+node_modules/

image/Dockerfile

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+FROM ruby:2
+
+RUN apk --no-cache add build-base rpm tar zip
+RUN gem install --no-document fpm -v 1.11.0
+
+COPY entrypoint.sh /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]

image/entrypoint.sh

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+#!/usr/bin/env sh
+
+set -e
+
+FPMOPTS="${INPUT_FPM_OPTS}" fpm $@