Fix Docker-based Development Workflow (#1031)

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: houseme <housemecn@gmail.com>

Dockerfile.source

@@ -72,7 +72,7 @@ COPY Cargo.toml Cargo.lock ./
 # 2) workspace member manifests (adjust if workspace layout changes)
 COPY rustfs/Cargo.toml rustfs/Cargo.toml
 COPY crates/*/Cargo.toml crates/
-COPY cli/rustfs-gui/Cargo.toml cli/rustfs-gui/Cargo.toml
+
 
 # Pre-fetch dependencies for better caching
 RUN --mount=type=cache,target=/usr/local/cargo/registry \
@@ -117,6 +117,49 @@ RUN --mount=type=cache,target=/usr/local/cargo/registry \
     ;; \
     esac
 
+# -----------------------------
+# Development stage (keeps toolchain)
+# -----------------------------
+FROM builder AS dev
+
+ARG BUILD_DATE
+ARG VCS_REF
+
+LABEL name="RustFS (dev-source)" \
+    maintainer="RustFS Team" \
+    build-date="${BUILD_DATE}" \
+    vcs-ref="${VCS_REF}" \
+    description="RustFS - local development with Rust toolchain."
+
+# Install runtime dependencies that might be missing in partial builder
+# (builder already has build-essential, lld, etc.)
+WORKDIR /app
+
+ENV CARGO_INCREMENTAL=1
+
+# Ensure we have the same default env vars available
+ENV RUSTFS_ADDRESS=":9000" \
+    RUSTFS_ACCESS_KEY="rustfsadmin" \
+    RUSTFS_SECRET_KEY="rustfsadmin" \
+    RUSTFS_CONSOLE_ENABLE="true" \
+    RUSTFS_VOLUMES="/data" \
+    RUST_LOG="warn" \
+    RUSTFS_OBS_LOG_DIRECTORY="/logs" \
+    RUSTFS_USERNAME="rustfs" \
+    RUSTFS_GROUPNAME="rustfs" \
+    RUSTFS_UID="1000" \
+    RUSTFS_GID="1000"
+
+# Note: We don't COPY source here because we expect it to be mounted at /app
+# We rely on cargo run to build and run
+EXPOSE 9000 9001
+
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]
+CMD ["cargo", "run", "--bin", "rustfs", "--"]
+
 # -----------------------------
 # Runtime stage (Ubuntu minimal)
 # -----------------------------