build(docker): update container image

flashbots/Dockerfile

@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1
+# syntaxdocker/dockerfile-upstream:master-experimental
 FROM golang:1.17-alpine AS builder
 
 RUN apk add --no-cache gcc musl-dev linux-headers git
@@ -9,14 +9,24 @@ WORKDIR /go-ethereum
 RUN go run build/ci.go install ./cmd/geth
 
 # Pull all binaries into a second stage deploy alpine container
-FROM alpine:3.14.2
+FROM alpine:3.15
+
+RUN apk update && apk upgrade \
+    && apk add --no-cache bash jq ca-certificates \
+    && rm -rf /var/cache/*/* \
+    && echo "" > /root/.ash_history
+
+# change default shell from ash to bash
+RUN sed -i -e "s/bin\/ash/bin\/bash/" /etc/passwd
+ENV LC_ALL=en_US.UTF-8
+WORKDIR /root
 
-RUN apk add --no-cache bash ca-certificates
 COPY --from=builder /go-ethereum/build/bin/* /usr/local/bin/
 
+COPY --chmod=0755 ./entrypoint.sh /root/entrypoint.sh
+#RUN chmod 755 /root/entrypoint.sh
+
 
-COPY ./entrypoint.sh /root/entrypoint.sh
-RUN chmod 755 /root/entrypoint.sh
 ENTRYPOINT ["geth"]
 
 EXPOSE 8545 8546 30303 30303/udp