chore: remove Dockerfile and .gitignore from calculator-rust example

Align with other examples — no example ships a Dockerfile or its own
.gitignore. Rust build artifacts are now covered by the repo-level
.gitignore instead.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitignore

@@ -88,6 +88,8 @@ typings/
 # Claude files
 .claude.json
 .claude/
+CLAUDE.md
+PROJECT_STATUS.md
 
 # Vite
 .vite/
@@ -107,4 +109,8 @@ self-signed-key.pem
 invalid-json.json
 **/server/lib/**
 
+# Rust example build artifacts
+examples/calculator-rust/target/
+examples/calculator-rust/server/
+
 .yarn/install-state.gz

examples/calculator-rust/.gitignore

@@ -1,3 +0,0 @@
-target/
-Cargo.lock
-server/mcp-calculator

examples/calculator-rust/.mcpbignore

@@ -2,6 +2,4 @@ Cargo.toml
 Cargo.lock
 src/
 target/
-Dockerfile
 README.md
-.gitignore

examples/calculator-rust/Dockerfile

@@ -1,11 +0,0 @@
-FROM rust:1.94-bookworm AS builder
-
-WORKDIR /app
-COPY Cargo.toml ./
-COPY src/ ./src/
-
-RUN cargo build --release
-
-FROM debian:bookworm-slim
-COPY --from=builder /app/target/release/mcp-calculator /mcp-calculator
-ENTRYPOINT ["/mcp-calculator"]

examples/calculator-rust/README.md

@@ -18,9 +18,7 @@ The tradeoff is that binaries are platform-specific — you need a separate buil
 calculator-rust/
 ├── manifest.json       # server.type = "binary"
 ├── Cargo.toml          # Rust project
-├── Dockerfile          # Build via Docker
 ├── .mcpbignore         # Exclude source from bundle
-├── .gitignore          # Exclude build artifacts
 └── src/
     └── main.rs         # Calculator MCP server (~80 LOC)
 ```
@@ -29,7 +27,7 @@ After building, the `server/` directory is created with the compiled binary.
 
 ## Building
 
-### Native (requires Rust 1.85+)
+Requires [Rust](https://rustup.rs/) 1.85+.
 
 ```bash
 cd examples/calculator-rust
@@ -38,18 +36,6 @@ mkdir -p server
 cp target/release/mcp-calculator server/
 ```
 
-### Docker (no local Rust required)
-
-```bash
-cd examples/calculator-rust
-docker build -t mcp-calculator .
-# Extract the binary (linux only)
-docker create --name calc mcp-calculator
-docker cp calc:/mcp-calculator server/mcp-calculator
-docker rm calc
-chmod +x server/mcp-calculator
-```
-
 ## Packing
 
 ```bash