Move scripts to scripts folder and update readme (#2331)

* Move scripts to scripts folder and update readme

* Update node-template/README.md

Co-Authored-By: xlc <xlchen1291@gmail.com>

* Update node-template/README.md

Co-Authored-By: xlc <xlchen1291@gmail.com>

* Update node-template/README.md

Co-Authored-By: xlc <xlchen1291@gmail.com>

* Update node-template/README.md

Co-Authored-By: xlc <xlchen1291@gmail.com>

* Update node-template/README.md

Co-Authored-By: xlc <xlchen1291@gmail.com>

* Update node-template/README.md

Co-Authored-By: xlc <xlchen1291@gmail.com>

* remove release flag

substrate/node-template/scripts/build.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+set -e
+
+PROJECT_ROOT="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )"
+
+export CARGO_INCREMENTAL=0
+
+bold=$(tput bold)
+normal=$(tput sgr0)
+
+# Save current directory.
+pushd . >/dev/null
+
+for SRC in runtime/wasm
+do
+  echo "${bold}Building webassembly binary in $SRC...${normal}"
+  cd "$PROJECT_ROOT/$SRC"
+
+  ./build.sh
+
+  cd - >> /dev/null
+done
+
+# Restore initial directory.
+popd >/dev/null

substrate/node-template/scripts/init.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+set -e
+
+echo "*** Initializing WASM build environment"
+
+if [ -z $CI_PROJECT_NAME ] ; then
+   rustup update nightly
+   rustup update stable
+fi
+
+rustup target add wasm32-unknown-unknown --toolchain nightly
+
+# Install wasm-gc. It's useful for stripping slimming down wasm binaries.
+command -v wasm-gc || \
+	cargo +nightly install --git https://github.com/alexcrichton/wasm-gc --force