Add numberOfAvailabilityZones param to Project constructor (#16)

Author: mbareta

README.md

@@ -94,13 +94,15 @@ type ProjectArgs = {
     | EcsServiceOptions
   )[];
   enableSSMConnect?: pulumi.Input<boolean>;
+  numberOfAvailabilityZones?: number;
 };
 ```
 
 | Argument         |                                                                         Description                                                                          |
 | :--------------- | :----------------------------------------------------------------------------------------------------------------------------------------------------------: |
 | services \*      |                                                                        Service list.                                                                         |
 | enableSSMConnect | Setup ec2 instance and SSM in order to connect to the database in the private subnet. Please refer to the [SSM Connect](#ssm-connect) section for more info. |
+| numberOfAvailabilityZones | Default is 2 which is recommended. If building a dev server, we can reduce to 1 availability zone to reduce hosting cost. |
 
 ```ts
 type DatabaseServiceOptions = {

src/components/project.ts

@@ -116,6 +116,7 @@ export type ProjectArgs = {
     | EcsServiceOptions
   )[];
   enableSSMConnect?: pulumi.Input<boolean>;
+  numberOfAvailabilityZones?: number;
 };
 
 export class MissingEcsCluster extends Error {
@@ -141,7 +142,7 @@ export class Project extends pulumi.ComponentResource {
     super('studion:Project', name, {}, opts);
     this.name = name;
 
-    this.vpc = this.createVpc();
+    this.vpc = this.createVpc(args.numberOfAvailabilityZones);
     this.createServices(args.services);
 
     if (args.enableSSMConnect) {
@@ -155,11 +156,13 @@ export class Project extends pulumi.ComponentResource {
     this.registerOutputs();
   }
 
-  private createVpc() {
+  private createVpc(
+    numberOfAvailabilityZones: ProjectArgs['numberOfAvailabilityZones'] = 2,
+  ) {
     const vpc = new awsx.ec2.Vpc(
       `${this.name}-vpc`,
       {
-        numberOfAvailabilityZones: 2,
+        numberOfAvailabilityZones,
         enableDnsHostnames: true,
         enableDnsSupport: true,
         subnetSpecs: [