Update YouTube support and add Gitea GPU build

backend/Dockerfile

@@ -1,8 +1,16 @@
+ARG DENO_VERSION=2.9.5
+ARG YT_DLP_VERSION=2026.08.19
+
+FROM denoland/deno:bin-${DENO_VERSION} AS deno_cache
+
 FROM --platform=$BUILDPLATFORM golang:bookworm AS ytdlp_cache
 ARG TARGETOS
 ARG TARGETARCH
+ARG YT_DLP_VERSION
+ARG YT_DLP_SHA256=1fa6733c37ea6fb51c99ad8fe785e7b7e5f3246c9b980230329d4fb72ed8d4d6
 RUN apt update && apt install -y wget
-RUN wget https://github.com/yt-dlp/yt-dlp/releases/latest/download/yt-dlp -O /usr/local/bin/yt-dlp
+RUN wget "https://github.com/yt-dlp/yt-dlp/releases/download/${YT_DLP_VERSION}/yt-dlp" -O /usr/local/bin/yt-dlp \
+    && echo "${YT_DLP_SHA256}  /usr/local/bin/yt-dlp" | sha256sum -c -
 RUN chmod a+rx /usr/local/bin/yt-dlp
 
 FROM devopsworks/golang-upx:1.23 as builder
@@ -23,6 +31,7 @@ WORKDIR /app
 COPY --from=builder /app/whishper ./whishper 
 RUN chmod a+rx ./whishper
 COPY --from=ytdlp_cache /usr/local/bin/yt-dlp /bin/yt-dlp
+COPY --from=deno_cache /deno /bin/deno
 
 RUN mkdir /app/uploads