Initial version

.github/workflows/publish.yml

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+name: Publish image
+on:
+  push:
+    branches: [main]
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+    steps:
+      - uses: actions/checkout@v4
+      - uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - uses: docker/build-push-action@v6
+        with:
+          push: true
+          tags: ghcr.io/${{ github.repository }}:latest

Dockerfile

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+FROM python:3.12-slim
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    fontforge ttfautohint \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN pip install --no-cache-dir fonttools
+
+WORKDIR /build

README.md

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+# fntbld-oci
+
+A container image with font-building tools pre-installed:
+
+- **FontForge** — scriptable font editor
+- **ttfautohint** — auto-hinter for TrueType fonts
+- **fontTools** — Python library for manipulating font files
+
+The image contains no project-specific files. Mount or clone your font project into `/build` at runtime.
+
+## Build locally
+
+```bash
+podman build -t fntbld-oci .
+```
+
+## Pull from GitHub Container Registry
+
+```bash
+podman pull ghcr.io/nicoverbruggen/fntbld-oci:latest
+```
+
+## Usage
+
+From your font project directory:
+
+```bash
+podman run --rm -v .:/build ghcr.io/nicoverbruggen/fntbld-oci python3 build.py
+```
+
+## Debugging
+
+To rebuild and get a shell inside the container:
+
+```bash
+podman build -t fntbld-oci . && podman run --rm -it fntbld-oci sh
+```