Update init script to use existing genesis file (#47)

Part of [laconicd testnet validator enrollment](https://www.notion.so/laconicd-testnet-validator-enrollment-6fc1d3cafcc64fef8c5ed3affa27c675)

Co-authored-by: Adw8 <adwaitgharpure@gmail.com>
Reviewed-on: cerc-io/laconicd#47

Dockerfile

@@ -25,6 +25,9 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 # Copy over binary from the builder
 COPY --from=builder /go/src/git.vdb.to/cerc-io/laconicd/build/laconicd /usr/bin/laconicd
 
+#  Copy over init script from builder
+COPY --from=builder /go/src/git.vdb.to/cerc-io/laconicd/scripts/init.sh scripts/init.sh
+
 WORKDIR /
 
 # Run laconicd by default