Restore providers.tf and add example configuration for AWS ALB and Route53

Author: sabarish244

main.tf

@@ -1,5 +1,5 @@
 module "alb" {
-  providers = { aws = aws.alb }
+  providers = { aws.alb = aws.alb }
   source    = "./modules/alb"
 
   description         = var.description
@@ -14,7 +14,7 @@ module "alb" {
 }
 
 module "cloudwatch_alarms" {
-  providers = { aws = aws.alb }
+  providers = { aws.alb = aws.alb }
   source    = "./modules/alb-cloudwatch-alarms"
 
   alarm_actions            = var.alarm_actions
@@ -26,14 +26,14 @@ module "cloudwatch_alarms" {
 }
 
 module "http" {
-  providers = { aws = aws.alb }
+  providers = { aws.alb = aws.alb }
   source    = "./modules/alb-http-redirect"
 
   alb = module.alb.instance
 }
 
 module "https" {
-  providers = { aws = aws.alb }
+  providers = { aws.alb = aws.alb }
   source    = "./modules/alb-https-forward"
 
   alb                      = module.alb.instance
@@ -70,7 +70,7 @@ module "alias" {
 
 module "target_group" {
   for_each  = var.target_groups
-  providers = { aws = aws.alb }
+  providers = { aws.alb = aws.alb }
   source    = "./modules/alb-target-group"
 
   enable_stickiness = var.enable_stickiness