avdeev/index.html.envtmpl

## index.html.envtmpl
<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <meta name="mobile-web-app-capable" content="yes">
    <title>Title</title>
  </head>
  <body>
    <script>
        config_obj.node_env = ${NODE_ENV}
        config_obj.app_env = ${APP_ENV}
        config_obj.version = ${VERSION}
    </script>
    <noscript>If you're seeing this message, that means <strong>JavaScript has been disabled on your browser</strong>, please <strong>enable JS</strong> to make this app work.</noscript>
    <div id="app"></div>
  </body>
</html>

## render.sh
#!/bin/bash
export NODE_ENV=some_outside_info_1
export APP_ENV=some_outside_info_2
export VERSION=some_outside_info_3
set -x
for FILE in $(find ./ -name '*.envtmpl'); do
    FILE_STRIPPED="${FILE%.*}"
    envsubst < ${FILE} > ${FILE_STRIPPED}
done
	<!doctype html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<meta name="mobile-web-app-capable" content="yes">
	<title>Title</title>
	</head>
	<body>
	<script>
	config_obj.node_env = ${NODE_ENV}
	config_obj.app_env = ${APP_ENV}
	config_obj.version = ${VERSION}
	</script>
	<noscript>If you're seeing this message, that means <strong>JavaScript has been disabled on your browser</strong>, please <strong>enable JS</strong> to make this app work.</noscript>
	<div id="app"></div>
	</body>
	</html>
	#!/bin/bash
	export NODE_ENV=some_outside_info_1
	export APP_ENV=some_outside_info_2
	export VERSION=some_outside_info_3
	set -x
	for FILE in $(find ./ -name '*.envtmpl'); do
	FILE_STRIPPED="${FILE%.*}"
	envsubst < ${FILE} > ${FILE_STRIPPED}
	done