add dockerfile

Dockerfile

@@ -0,0 +1,11 @@
+FROM rust:alpine as builder
+RUN apk add --no-cache musl-dev
+WORKDIR /usr/src/svr
+COPY . .
+RUN cargo build --release
+
+FROM alpine:edge
+RUN apk add --no-cache yt-dlp
+COPY --from=builder /usr/src/svr/target/release/svr /usr/local/bin/svr
+
+CMD ["/usr/local/bin/svr"]