Added capture jvs

Author: igba.ujege

proxies/live/apiproxy/resources/jsc/CaptureProxyHostName.js

@@ -0,0 +1,4 @@
+const env_regex = /^([a-zA-Z0-9-]+\.)?api\.service\.nhs\.uk/gm;
+var hostname_env = request.headers.host;
+hostname_env = hostname_env.match(env_regex, request.headers.host)[0];
+context.setVariable("request_hostname_env", hostname_env);