fix: replace vulnerable container bases and release v0.1.21

Dockerfile

@@ -1,36 +1,24 @@
-ARG PYTHON_BASE=python:3.14.5-slim-bookworm@sha256:ec58d916f9e24a6035cab2bdf07f6206c4cc092a16613c60597534711332d9d6
+ARG PYTHON_BASE=python:3.14.8-alpine3.24@sha256:f6a589d43c42b9e7f7dc67a12d37132491f362859a5d750607710cc56da3bc72
 FROM ${PYTHON_BASE} AS prepared
-ARG DEBIAN_MIRROR=deb.debian.org
-ARG DEBIAN_SECURITY_MIRROR=deb.debian.org
+ARG ALPINE_MIRROR=dl-cdn.alpinelinux.org
 ARG TARGETARCH
 ENV PYTHONDONTWRITEBYTECODE=1 PYTHONUNBUFFERED=1 TZ=Asia/Shanghai \
     DATA_DIR=/data CONFIG_DIR=/config
 WORKDIR /app
-# CJK fonts intentionally retained for readable Chinese rendering.
-RUN --mount=type=cache,id=frameflow-bookworm-apt-${TARGETARCH},target=/var/cache/apt,sharing=locked \
-    --mount=type=cache,id=frameflow-bookworm-lists-${TARGETARCH},target=/var/lib/apt/lists,sharing=locked \
-    --mount=type=bind,source=build-cache/debs,target=/build-debs,readonly \
-    rm -f /etc/apt/apt.conf.d/docker-clean \
-    && printf 'Binary::apt::APT::Keep-Downloaded-Packages "true";\n' > /etc/apt/apt.conf.d/keep-cache \
-    && sed -i "s|http://deb.debian.org/debian-security|https://${DEBIAN_SECURITY_MIRROR}/debian-security|g; s|http://deb.debian.org/debian|https://${DEBIAN_MIRROR}/debian|g" /etc/apt/sources.list.d/debian.sources \
-    && apt-get -o Acquire::Retries=3 -o Acquire::https::Timeout=60 update \
-    && apt-get -y --no-install-recommends upgrade \
-    && if [ -f /build-debs/fonts-noto-cjk.deb ]; then \
-         font_version=$(apt-cache policy fonts-noto-cjk | awk '$1=="Candidate:" {print $2}'); \
-         font_sha=$(apt-cache show "fonts-noto-cjk=$font_version" | awk '$1=="SHA256:" {print $2;exit}'); \
-         test -n "$font_sha"; \
-         echo "$font_sha  /build-debs/fonts-noto-cjk.deb" | sha256sum -c -; \
-         apt-get install -y --no-install-recommends tzdata; \
-         dpkg -i /build-debs/fonts-noto-cjk.deb; \
-       else apt-get install -y --no-install-recommends fonts-noto-cjk tzdata; fi \
-    && groupadd --gid 10333 frameflow && useradd --uid 10333 --gid 10333 --no-create-home frameflow \
+# Preserve the existing FONT_PATH contract for deployments and Chinese rendering.
+RUN sed -i "s|https://dl-cdn.alpinelinux.org/alpine|https://${ALPINE_MIRROR}/alpine|g" /etc/apk/repositories \
+    && apk upgrade --no-cache \
+    && apk add --no-cache font-noto-cjk tzdata \
+    && mkdir -p /usr/share/fonts/opentype/noto \
+    && ln -s /usr/share/fonts/noto/NotoSansCJK-Regular.ttc /usr/share/fonts/opentype/noto/NotoSansCJK-Regular.ttc \
+    && addgroup -g 10333 frameflow && adduser -D -H -u 10333 -G frameflow frameflow \
     && mkdir -p /data/images /data/generated /data/cache /config \
     && chown -R 10333:10333 /data /config
 COPY requirements.lock ./
 COPY scripts/ci-install.py /build-tools/install.py
 ARG DOCKER_PIP_INDEX_URL=https://mirrors.tuna.tsinghua.edu.cn/pypi/web/simple
 ARG DOCKER_PIP_FALLBACK_INDEX_URL=https://pypi.org/simple
-RUN --mount=type=cache,id=frameflow-pip-py314-${TARGETARCH},target=/root/.cache/pip,sharing=locked \
+RUN --mount=type=cache,id=frameflow-pip-py314-musl-${TARGETARCH},target=/root/.cache/pip,sharing=locked \
     --mount=type=bind,source=build-cache/wheels,target=/build-wheels,readonly \
     if [ -f /build-wheels/SHA256SUMS ]; then \
       (cd /build-wheels && sha256sum -c SHA256SUMS) \
@@ -55,6 +43,7 @@ WORKDIR /app
 ARG BUILD_COMMIT=development
 ARG BUILD_TIME=unknown
 ENV BUILD_COMMIT=$BUILD_COMMIT BUILD_TIME=$BUILD_TIME
+LABEL org.opencontainers.image.title="PIGWay Frame Flow" org.opencontainers.image.version="0.1.21" org.opencontainers.image.revision=$BUILD_COMMIT
 USER 10333:10333
 EXPOSE 18787
 HEALTHCHECK --interval=30s --timeout=5s --start-period=20s --retries=3 \