Updates for stage2 setup (#60)

Part of [Create a public laconicd testnet](https://www.notion.so/Create-a-public-laconicd-testnet-896a11bdd8094eff8f1b49c0be0ca3b8)

- Add `bc` installation in Dockerfile (required for stage1 to stage2 testnet migration)
- Populate attributes map index when importing records from genesis to allow fetching records with filters from a chain with imported state

Reviewed-on: cerc-io/laconicd#60
Co-authored-by: Prathamesh Musale <prathamesh.musale0@gmail.com>
Co-committed-by: Prathamesh Musale <prathamesh.musale0@gmail.com>

scripts/init.sh

@@ -10,7 +10,7 @@ LOGLEVEL=${LOGLEVEL:-"info"}
 
 input_genesis_file=${GENESIS_FILE}
 
-if [ "$1" == "clean" ] || [ ! -d "$HOME/.laconicd/data/blockstore.db" ]; then
+if [ "$1" == "clean" ] || [ ! -d "$HOME/.laconicd/data" ]; then
   # validate dependencies are installed
   command -v jq > /dev/null 2>&1 || {
     echo >&2 "jq not installed. More info: https://stedolan.github.io/jq/download/"
@@ -30,7 +30,7 @@ if [ "$1" == "clean" ] || [ ! -d "$HOME/.laconicd/data/blockstore.db" ]; then
   # if $KEY exists it should be deleted
   laconicd keys add $KEY --keyring-backend $KEYRING
 
-  # Set moniker and chain-id for Ethermint (Moniker can be anything, chain-id must be an integer)
+  # Set moniker and chain-id
   laconicd init $MONIKER --chain-id $CHAINID --default-denom $DENOM
 
   if [[ -f ${input_genesis_file} ]]; then