feat: Fix Go installation for Apple Silicon and add tmp.benchmarks to gitignore

Author: paulmaunders

.gitignore

@@ -15,3 +15,4 @@ aider/_version.py
 .venv/
 .#*
 .gitattributes
+tmp.benchmarks/

benchmark/Dockerfile

@@ -18,10 +18,18 @@ RUN apt-get update && apt-get install -y \
 # Make python3.11 the default python3
 RUN update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.11 1
 
-# Install Go
-RUN curl -OL https://golang.org/dl/go1.21.5.linux-amd64.tar.gz && \
-    tar -C /usr/local -xzf go1.21.5.linux-amd64.tar.gz && \
-    rm go1.21.5.linux-amd64.tar.gz
+# Install Go with architecture detection
+RUN ARCH=$(uname -m) && \
+    if [ "$ARCH" = "x86_64" ]; then \
+        GOARCH="amd64"; \
+    elif [ "$ARCH" = "aarch64" ]; then \
+        GOARCH="arm64"; \
+    else \
+        false; \
+    fi && \
+    curl -L "https://golang.org/dl/go1.21.5.linux-$GOARCH.tar.gz" -o go.tar.gz && \
+    tar -C /usr/local -xzf go.tar.gz && \
+    rm go.tar.gz
 ENV PATH="/usr/local/go/bin:${PATH}"
 
 # Install Rust