examples/jamstack: added README and example app config

Signed-off-by: Sam Alba <sam.alba@gmail.com>

examples/jamstack/app_config.cue

@@ -0,0 +1,62 @@
+package main
+
+import (
+	"dagger.io/git"
+)
+
+name: "my-app"
+
+// DISCLAIMER: all values below are fake and are provided as examples
+
+infra: {
+	awsConfig: {
+		accessKey: "<REPLACE WITH AWS ACCESS KEY>"
+		secretKey: "<REPLACE WITH AWS SECRET KEY>"
+		region:    "us-east-1"
+	}
+	vpcId:             "vpc-020ctgv0bcde4242"
+	ecrRepository:     "8563296674124.dkr.ecr.us-east-1.amazonaws.com/apps"
+	ecsClusterName:    "bl-ecs-acme-764-ECSCluster-lRIVVg09G4HX"
+	elbListenerArn:    "arn:aws:elasticloadbalancing:us-east-1:8563296674124:listener/app/bl-ec-ECSAL-OSYI03K07BCO/3c2d3e78347bde5b/d02ac88cc007e24e"
+	rdsAdminSecretArn: "arn:aws:secretsmanager:us-east-1:8563296674124:secret:AdminPassword-NQbBi7oU4CYS9-IGgS3B"
+	rdsInstanceArn:    "arn:aws:rds:us-east-1:8563296674124:cluster:bl-rds-acme-764-rdscluster-8eg3xbfjggkfdg"
+	netlifyAccount: {
+		token: "<REPLACE WITH NETLIFY TOKEN>"
+	}
+}
+
+database: {
+	dbType: "mysql"
+}
+
+backend: {
+	source: git.#Repository & {
+		remote: "https://github.com/blocklayerhq/acme-clothing.git"
+		ref:    "HEAD"
+		subdir: "./crate/code/api"
+	}
+
+	// DNS needs to be already configured to the ALB load-balancer
+	// and a valid certificate needs to be configured for that listener
+	hostname: "\(name).acme-764-api.microstaging.io"
+
+	container: {
+		healthCheckPath:    "/health-check"
+		healthCheckTimeout: 40
+	}
+}
+
+frontend: {
+	source: git.#Repository & {
+		remote: "https://github.com/blocklayerhq/acme-clothing.git"
+		ref:    "HEAD"
+		subdir: "./crate/code/web"
+	}
+
+	writeEnvFile: ".env"
+
+	yarn: {
+		buildDir: "public"
+		script:   "build:client"
+	}
+}

examples/jamstack/database.cue

@@ -7,7 +7,7 @@ import (
 
 database: {
 	let slug = name
-	dbType: "mysql"
+	dbType: "mysql" | "postgresql"
 
 	db: rds.#CreateDB & {
 		config:    infra.awsConfig