fix btcec !cgo thing and add the cgo secp256k1 install script

p256k/btcec.go

@@ -3,6 +3,7 @@
 package p256k
 
 import (
+	"relay.mleku.dev/log"
 	"relay.mleku.dev/p256k/btcec"
 )
 

ubuntu_install_libsecp256k1.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+sudo apt -y install build-essential autoconf libtool
+cd $SCRIPT_DIR
+rm -rf secp256k1
+git clone https://github.com/bitcoin-core/secp256k1.git
+cd secp256k1
+git checkout v0.6.0
+git submodule init
+git submodule update
+./autogen.sh
+./configure --enable-module-schnorrsig --enable-module-ecdh --prefix=/usr
+make -j1
+sudo make install