style: revert Dockerfile format (#296)

Author: 0xmountaintop

.gitignore

@@ -47,4 +47,3 @@ profile.cov
 /dashboard/assets/package-lock.json
 
 **/yarn-error.log
-

Dockerfile

@@ -6,15 +6,15 @@ ARG BUILDNUM=""
 # Build Geth in a stock Go builder container
 FROM golang:1.18-alpine as builder
 
-ENV GOPROXY https://proxy.golang.org,direct
+RUN apk add --no-cache gcc musl-dev linux-headers git
 
 ADD . /go-ethereum
-RUN apk add --no-cache gcc musl-dev linux-headers git ca-certificates \
-    && cd /go-ethereum && go run build/ci.go install ./cmd/geth
+RUN cd /go-ethereum && go run build/ci.go install ./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