chore: move elf to workdir to copy

Author: jeffpeng3

Dockerfile

@@ -8,15 +8,14 @@ COPY . .
 RUN --mount=type=cache,target=/usr/local/cargo/git/db \
     --mount=type=cache,target=/usr/local/cargo/registry/ \
     --mount=type=cache,target=/its_mypic_image_server/target/ \
-    cargo build --release
-
+    cargo build --release; mv target/release/its_mypic_image_server /its_mypic_image_server/its_mypic_image_server
 
 FROM gcr.io/distroless/cc
 
 WORKDIR /its_mypic_image_server
 
 COPY --from=mwader/static-ffmpeg:7.1 /ffmpeg /usr/local/bin/
 
-COPY --from=builder /its_mypic_image_server/target/release/its_mypic_image_server .
+COPY --from=builder /its_mypic_image_server/its_mypic_image_server .
 
 CMD ["/its_mypic_image_server/its_mypic_image_server"]