Add CDN dependency download script and update Dockerfiles for offline web UI

docker/Dockerfile

@@ -26,7 +26,15 @@ COPY . .
 RUN --mount=type=cache,target=/root/.cache/go-build CGO_ENABLED=0 go build -ldflags "-s -w" -trimpath
 
 
-# 2. Final image
+# 2. Download CDN dependencies for offline web UI
+FROM alpine AS download-cdn
+RUN apk add --no-cache wget
+COPY www/ /web/
+COPY docker/download_cdn.sh /tmp/
+RUN sh /tmp/download_cdn.sh /web
+
+
+# 3. Final image
 FROM python:${PYTHON_VERSION}-alpine AS base
 
 # Install ffmpeg, tini (for signal handling),
@@ -46,10 +54,11 @@ RUN if [ "${TARGETARCH}" = "amd64" ]; then apk add --no-cache libva-intel-driver
 # RUN libva-vdpau-driver mesa-vdpau-gallium (+150MB total)
 
 COPY --from=build /build/go2rtc /usr/local/bin/
+COPY --from=download-cdn /web /var/www/go2rtc
+COPY --chmod=755 docker/entrypoint.sh /usr/local/bin/
 
 EXPOSE 1984 8554 8555 8555/udp
-ENTRYPOINT ["/sbin/tini", "--"]
+ENTRYPOINT ["/sbin/tini", "--", "/usr/local/bin/entrypoint.sh"]
 VOLUME /config
 WORKDIR /config
 
-CMD ["go2rtc", "-config", "/config/go2rtc.yaml"]