Added drone

Dockerfile

@@ -0,0 +1,21 @@
+FROM rust:1.60 as builder
+
+WORKDIR /usr/src/scel
+
+COPY . .
+
+RUN --mount=type=cache,target=/usr/src/scel/target cargo build --release
+RUN --mount=type=cache,target=/usr/src/scel/target cargo install --path src/cmd/scel
+
+FROM debian:bullseye-slim
+
+# Install YTD
+RUN rm -f /etc/apt/apt.conf.d/docker-clean; echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' > /etc/apt/apt.conf.d/keep-cache
+RUN --mount=type=cache,target=/var/cache/apt --mount=type=cache,target=/var/lib/apt \
+  apt-get update && apt-get install -y python3 python3-pip
+RUN python3 -m pip install -U yt-dlp
+
+# Copy binary
+COPY --from=builder /usr/local/cargo/bin/scel /usr/local/bin/scel
+
+CMD ["scel"]