docker: fix incorrect time_iota_ms configuration (#5385)

CHANGELOG_PENDING.md

@@ -53,3 +53,5 @@ Friendly reminder, we have a [bug bounty program](https://hackerone.com/tendermi
 - [consensus] \#5329 Fix wrong proposer schedule for validators returned by `InitChain` (@erikgrinaker)
 
 - [light] [\#5307](https://github.com/tendermint/tendermint/pull/5307) Persist correct proposer priority in light client validator sets (@cmwaters)
+
+- [docker] Fix incorrect `time_iota_ms` configuration in default image (@erikgrinaker)

DOCKER/docker-entrypoint.sh

@@ -3,19 +3,21 @@ set -e
 
 if [ ! -d "$TMHOME/config" ]; then
 	echo "Running tendermint init to create (default) configuration for docker run."
-	tendermint init &&
-		sed -i \
-			-e "s/^proxy_app\s*=.*/proxy_app = \"$PROXY_APP\"/" \
-			-e "s/^moniker\s*=.*/moniker = \"$MONIKER\"/" \
-			-e 's/^addr_book_strict\s*=.*/addr_book_strict = false/' \
-			-e 's/^timeout_commit\s*=.*/timeout_commit = "500ms"/' \
-			-e 's/^index_all_tags\s*=.*/index_all_tags = true/' \
-			-e 's,^laddr = "tcp://127.0.0.1:26657",laddr = "tcp://0.0.0.0:26657",' \
-			-e 's/^prometheus\s*=.*/prometheus = true/' \
-			"$TMHOME/config/config.toml" &&
-		sed -i \
-			-e "s/^\s*\"chain_id\":.*/  \"chain_id\": \"$CHAIN_ID\",/" \
-			"$TMHOME/config/genesis.json"
+	tendermint init
+
+	sed -i \
+		-e "s/^proxy_app\s*=.*/proxy_app = \"$PROXY_APP\"/" \
+		-e "s/^moniker\s*=.*/moniker = \"$MONIKER\"/" \
+		-e 's/^addr_book_strict\s*=.*/addr_book_strict = false/' \
+		-e 's/^timeout_commit\s*=.*/timeout_commit = "500ms"/' \
+		-e 's/^index_all_tags\s*=.*/index_all_tags = true/' \
+		-e 's,^laddr = "tcp://127.0.0.1:26657",laddr = "tcp://0.0.0.0:26657",' \
+		-e 's/^prometheus\s*=.*/prometheus = true/' \
+		"$TMHOME/config/config.toml"
+
+	jq ".chain_id = \"$CHAIN_ID\" | .consensus_params.block.time_iota_ms = \"500\"" \
+		"$TMHOME/config/genesis.json" > "$TMHOME/config/genesis.json.new"
+	mv "$TMHOME/config/genesis.json.new" "$TMHOME/config/genesis.json"
 fi
 
 exec tendermint "$@"