fix: use ipv4 localhost to fix docker defaulting to ipv6 and breaking…

… url parsing

Dockerfile.e2e

@@ -67,7 +67,7 @@ ENV DATA_DIR=/chainstate/stacks-blockchain-data
 ENV BTC_ADDR=miEJtNKa3ASpA19v5ZhvbKTEieYjLpzCYT
 ENV BTC_ADDR_WIF=cStMQXkK5yTFGP3KbNXYQ3sJf2qwQiKrZwR9QJnksp32eKzef1za
 ENV MINER_SEED=9e446f6b0c6a96cf2190e54bcd5a8569c3e386f091605499464389b8d4e0bfc201
-ENV BITCOIN_PEER_HOST=localhost
+ENV BITCOIN_PEER_HOST=127.0.0.1
 ENV BITCOIN_PEER_PORT=18444
 ENV BITCOIN_RPC_PORT=18443
 ENV BITCOIN_RPC_USER=btc
@@ -165,7 +165,7 @@ RUN <<EOF
   STACKS_PID=$!
 
   while true; do
-    HEIGHT=$(curl -s localhost:20443/v2/info | jq '.burn_block_height')
+    HEIGHT=$(curl -s 127.0.0.1:20443/v2/info | jq '.burn_block_height')
     if [ "$HEIGHT" = "101" ]; then
       echo "Stacks node caught up to Bitcoin block $HEIGHT"
       break
@@ -183,7 +183,7 @@ RUN <<EOF
       echo "Current Bitcoin chain height: $chain_height"
 
       while true; do
-        HEIGHT=$(curl -s localhost:20443/v2/info | jq '.burn_block_height')
+        HEIGHT=$(curl -s 127.0.0.1:20443/v2/info | jq '.burn_block_height')
         if [ "$HEIGHT" = "$chain_height" ]; then
           echo "Stacks node caught up to Bitcoin block $HEIGHT"
           break