merged ln metadata into manga mover

Dockerfile

@@ -1,8 +1,18 @@
+# One Dockerfile, two images: the build arg APP selects the entry point.
+#
+#   docker build --build-arg APP=manga -t .../manga-mover-and-metadata-collector .
+#   docker build --build-arg APP=ln    -t .../kavita-lightnovel-metadata-fetcher .
+#
+# Both variants share src/; the variant-specific code lives in
+# src/manga/ resp. src/ln/ and is selected by the entry point.
+
 FROM python:3.12-slim
 
+ARG APP=manga
+
 WORKDIR /app
 
-# System deps for Pillow (image dimensions); kept minimal.
+# System deps for Pillow (image dimensions, manga variant); kept minimal.
 RUN apt-get update \
  && apt-get install -y --no-install-recommends \
         libjpeg62-turbo \
@@ -11,15 +21,17 @@ RUN apt-get update \
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
-COPY src/     /app/src/
-COPY main.py  /app/main.py
+COPY src/          /app/src/
+COPY main_manga.py main_ln.py /app/
 
 ENV PYTHONUNBUFFERED=1 \
-    PYTHONDONTWRITEBYTECODE=1
+    PYTHONDONTWRITEBYTECODE=1 \
+    APP_VARIANT=${APP}
 
-# Mount points used by main.py defaults
-VOLUME ["/mnt/suwayomi", "/mnt/kavita", "/config"]
+# /config is used by both variants; the manga variant additionally mounts
+# /mnt/suwayomi and /mnt/kavita (see docker-compose.prod.yml).
+VOLUME ["/config"]
 
 EXPOSE 8080
 
-CMD ["python", "/app/main.py"]
+CMD python /app/main_${APP_VARIANT}.py