do fantom with opera smarter

fantom/Dockerfile.opera

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+# Build Fantom in a stock Go builder container
+FROM golang:1.19-alpine as builder
+
+# Install packages we need
+RUN apk add --no-cache make gcc musl-dev linux-headers git
+
+# Make a folder to work in
+RUN mkdir /fantom
+
+# Grab VERSION from Build Args
+ARG VERSION
+ARG REPO
+
+# Clone the repo to that folder
+RUN git clone --branch ${VERSION} ${REPO:-https://github.com/Fantom-foundation/go-opera.git} /fantom
+
+# Build Fantom
+RUN cd /fantom && make
+
+# Pull Fantom into a second stage deploy alpine container
+FROM alpine:latest
+
+RUN apk add --no-cache ca-certificates wget tzdata
+COPY --from=builder /fantom/build/opera /usr/local/bin/
+
+VOLUME /datadir
+
+COPY ./scripts/entrypoint.opera.sh /usr/local/bin/entrypoint.sh
+RUN chmod u+x /usr/local/bin/entrypoint.sh
+ENTRYPOINT [ "/usr/local/bin/entrypoint.sh" ]