feat: update scripts to use env vars

- bitcoind entrypoint set chain value
- bitcoind healthcheck fix cli parameter
- lightning entrypoint script
- lightning health script
- prepend chain in bitcoin.conf

Signed-off-by: Lakshya Singh <lakshay.singh1108@gmail.com>

bitcoind/entrypoint.sh

@@ -1,7 +1,8 @@
 #!/bin/sh
 set -e
 
-cp -u /bitcoin.conf $BITCOIN_DATA/
+cp /bitcoin.conf $BITCOIN_DATA/
+sed -i "1s/^/chain=$BITCOIN_CHAIN\n/" $BITCOIN_DATA/bitcoin.conf
 
 if [ $(echo "$1" | cut -c1) = "-" ]; then
   echo "$0: assuming arguments for bitcoind"
@@ -9,5 +10,11 @@ if [ $(echo "$1" | cut -c1) = "-" ]; then
   set -- bitcoind "$@"
 fi
 
+if [ $(echo "$1" | cut -c1) = "-" ] || [ "$1" = "bitcoind" ]; then
+  echo "$0: setting chain to $BITCOIN_CHAIN"
+
+  set -- "$@" -chain=$BITCOIN_CHAIN
+fi
+
 echo
-exec "$@"
+exec "$@"

bitcoind/healthcheck.sh

@@ -1 +1 @@
-bitcoin-cli --chain=$BITCOIN_CHAIN getblockchaininfo
+bitcoin-cli -chain=$BITCOIN_CHAIN getblockchaininfo