docker: use less RAM at runtime

compile to bytecode so cpython doesn't have to keep it in memory

ram usage reduced by:
* min: 5.4 MiB (32.6 to 27.2)
* ac/im: 5.2 MiB (39.0 to 33.8)
* dj/iv: 10.6 MiB (67.3 to 56.7)

startup time reduced from:
* min: 1.3s to 0.6s
* ac/im: 1.6s to 0.9s
* dj/iv: 2.0s to 1.1s

image size increased by 4 MiB (min), 6 MiB (ac/im/iv), 9 MiB (dj)

ram usage measured on idle with:
while true; do ps aux | grep -E 'R[S]S|no[-]crt'; read -n1; echo; done

startup time measured with:
time podman run --rm -it localhost/copyparty-min-amd64 --exit=idx

scripts/docker/Dockerfile.iv

@@ -5,12 +5,11 @@ LABEL   org.opencontainers.image.url="https://github.com/9001/copyparty" \
         org.opencontainers.image.licenses="MIT" \
         org.opencontainers.image.title="copyparty-iv" \
         org.opencontainers.image.description="copyparty with Pillow, FFmpeg, libvips (image/audio/video thumbnails, audio transcoding, media tags)"
-ENV     PYTHONPYCACHEPREFIX=/tmp/pyc \
-        XDG_CONFIG_HOME=/cfg
+ENV     XDG_CONFIG_HOME=/cfg
 
 RUN     apk add -U !pyc \
             wget \
-            py3-argon2-cffi py3-pillow py3-pip py3-cffi \
+            py3-jinja2 py3-argon2-cffi py3-pillow py3-pip py3-cffi \
             ffmpeg \
             vips-jxl vips-heif vips-poppler vips-magick \
         && apk add -t .bd \
@@ -18,13 +17,11 @@ RUN     apk add -U !pyc \
             python3-dev py3-wheel \
         && rm -f /usr/lib/python3*/EXTERNALLY-MANAGED \
         && python3 -m pip install pyvips \
-        && apk del py3-pip .bd \
-        && rm -rf /var/cache/apk/* /tmp/pyc \
-        && mkdir /cfg /w \
-        && chmod 777 /cfg /w \
-        && echo % /cfg > initcfg
+        && apk del py3-pip .bd
+
+COPY    i/dist/copyparty-sfx.py innvikler.sh ./
+RUN     ash innvikler.sh && rm innvikler.sh
 
-COPY    i/dist/copyparty-sfx.py ./
 WORKDIR /w
 EXPOSE  3923
-ENTRYPOINT ["python3", "/z/copyparty-sfx.py", "--no-crt", "-c", "/z/initcfg"]
+ENTRYPOINT ["python3", "-m", "copyparty", "--no-crt", "-c", "/z/initcfg"]