Add support for https and http api url environment variable

src/Vegasco-Web/webserver.conf.template

@@ -1,8 +1,16 @@
+map ${services__Api__https__0} ${DOLLAR}apiUrl {
+    ~.+ ${services__Api__https__0};
+}
+
+map ${services__Api__http__0} ${DOLLAR}apiUrl {
+    ~.+ ${services__Api__http__0};
+}
+
 server {
     listen 80;
 
     location ~ ^/api/(.*) {
-        proxy_pass ${services__Api__https__0}/$1;
+        proxy_pass ${DOLLAR}apiUrl/${DOLLAR}1;
     }
 
     location / {