examples/jamstack: added README and example app config

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

examples/README.md

@@ -35,8 +35,8 @@ You can create new tokens from the [Netlify dashboard](https://app.netlify.com/u
 dagger input text www.account.token MY_TOKEN
 ```
 
-*NOTE: there is a dedicated command for encrypted secret inputs, but it is
-not yet implemented. Coming soon!*
+_NOTE: there is a dedicated command for encrypted secret inputs, but it is
+not yet implemented. Coming soon!_
 
 4. Deploy!
 
@@ -44,6 +44,53 @@ not yet implemented. Coming soon!*
 dagger up
 ```
 
+## Deploy a complete JAMstack app
+
+This example shows how to deploy a complete app with a backend, a database and a frontend.
+
+This app assumes the followinf infrastructure is available:
+
+- AWS ECS Cluster
+- AWS ALB with a TLS certificate
+- AWS RDS Instance (MySQL or PostgreSQL)
+- AWS ECR repository
+
+1. Prepare the app configuration
+
+Edit the file `./examples/jamstack/app_config.cue` and review all values to match to your own needs.
+
+2. Login your local docker daemon to ECR
+
+_This step is temporary and will be removed soon (gh issue #301)._
+
+```sh
+AWS_REGION="<REPLACE_WITH_AWS_REGION>"
+AWS_ID="<REPLACE_WITH_AWS_ACCOUNT_ID>"
+aws ecr get-login-password --region "$AWS_REGION" | docker login --username AWS --password-stdin "${AWS_ID}.dkr.ecr.${AWS_REGION}.amazonaws.com"
+```
+
+3. Deploy!
+
+```sh
+cd ./examples/jamstack
+dagger new
+dagger up
+```
+
+The example `app_config.cue` from the `./examples/jamstack` directory takes the source code from a remote git repository,
+but you can remove this from the file and instead points to a local source code:
+
+```sh
+dagger input dir backend.source ./my/local/backend/code
+```
+
+And the same mechanism applies for every single key in this file.
+
+4. Get the App URL
+
+```sh
+dagger query url
+```
 
 ## Provision a Kubernetes cluster on AWS
 
@@ -79,7 +126,6 @@ dagger input text awsConfig.accessKey MY_AWS_ACCESS_KEY
 dagger input text awsConfig.secretKey MY_AWS_SECRET_KEY
 ```
 
-
 4. Deploy!
 
 ```sh
@@ -103,7 +149,6 @@ Components:
 - [Amazon Cloudwatch Synthetics](https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/CloudWatch_Synthetics_Canaries.html) for hosting the monitoring scripts
 - [Amazon CloudFormation](https://aws.amazon.com/cloudformation) for infrastructure provisioning
 
-
 1. Change the current directory to the example deployment plan
 
 ```sh
@@ -142,7 +187,6 @@ dagger input text email my_email@my_domain.tld
 dagger up
 ```
 
-
 ## Deploy an application to your Kubernetes cluster
 
 This example shows two different ways to deploy an application to an existing Kubernetes cluster: with and without a Helm chart. Read the deployment plan](https://github.com/dagger/dagger/tree/main/examples/kubernetes-app)
@@ -157,7 +201,6 @@ Components:
 
 How to run:
 
-
 1. Change the current directory to the example deployment plan
 
 ```sh

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