chore: format Dockerfile for clarity

This PR Formatted the Dockerfile, breaking commands into blocks

Dockerfile

@@ -6,23 +6,32 @@ ARG BUILDNUM=""
 # Build Geth in a stock Go builder container
 FROM golang:1.24-alpine AS builder
 
-RUN apk add --no-cache gcc musl-dev linux-headers git
+RUN apk add --no-cache \
+    gcc \
+    musl-dev \
+    linux-headers \
+    git
 
 # Get dependencies - will also be cached if we won't change go.mod/go.sum
 COPY go.mod /go-ethereum/
 COPY go.sum /go-ethereum/
 RUN cd /go-ethereum && go mod download
 
+# Copy the full source tree
 ADD . /go-ethereum
+
+# Build statically linked geth binary
 RUN cd /go-ethereum && go run build/ci.go install -static ./cmd/geth
 
 # Pull Geth into a second stage deploy alpine container
 FROM alpine:latest
 
 RUN apk add --no-cache ca-certificates
+
 COPY --from=builder /go-ethereum/build/bin/geth /usr/local/bin/
 
 EXPOSE 8545 8546 30303 30303/udp
+
 ENTRYPOINT ["geth"]
 
 # Add some metadata labels to help programmatic image consumption
@@ -30,4 +39,6 @@ ARG COMMIT=""
 ARG VERSION=""
 ARG BUILDNUM=""
 
-LABEL commit="$COMMIT" version="$VERSION" buildnum="$BUILDNUM"
+LABEL commit="$COMMIT" \
+      version="$VERSION" \
+      buildnum="$BUILDNUM"