stdlib: add alpine

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

stdlib/alpine/alpine.cue

@@ -0,0 +1,30 @@
+package alpine
+
+import (
+	"dagger.io/dagger"
+)
+
+let defaultVersion = "3.13.2@sha256:a75afd8b57e7f34e4dad8d65e2c7ba2e1975c795ce1ee22fa34f8cf46f96a3be"
+
+#Image: {
+	package: [string]: true | false | string
+	version: string | *defaultVersion
+
+	#dagger: compute: [
+		dagger.#FetchContainer & {
+			ref: "index.docker.io/alpine:\(version)"
+		},
+		for pkg, info in package {
+			if (info & true) != _|_ {
+				dagger.#Exec & {
+					args: ["apk", "add", "-U", "--no-cache", pkg]
+				}
+			}
+			if (info & string) != _|_ {
+				dagger.#Exec & {
+					args: ["apk", "add", "-U", "--no-cache", "\(pkg)\(info)"]
+				}
+			}
+		},
+	]
+}

stdlib/netlify/netlify.cue

@@ -1,6 +1,9 @@
 package netlify
 
-import "dagger.io/dagger"
+import (
+	"dagger.io/dagger"
+	"dagger.io/alpine"
+)
 
 // A Netlify account
 #Account: {
@@ -34,20 +37,13 @@ import "dagger.io/dagger"
 		string
 
 		#dagger: compute: [
-			dagger.#FetchContainer & {
+			dagger.#Load & {
-				ref: "alpine@sha256:08d6ca16c60fe7490c03d10dc339d9fd8ea67c6466dea8d558526b1330a85930"
+				from: alpine.#Image & {
-			},
+					package: bash: "=5.1.0-r0"
-			dagger.#Exec & {
+					package: jq:   "=1.6-r1"
-				args: ["apk", "add", "-U", "--no-cache", "bash=5.1.0-r0"]
+					package: curl: "=7.74.0-r0"
-			},
+					package: yarn: "=1.22.10-r0"
-			dagger.#Exec & {
+				}
-				args: ["apk", "add", "-U", "--no-cache", "jq=1.6-r1"]
-			},
-			dagger.#Exec & {
-				args: ["apk", "add", "-U", "--no-cache", "curl=7.74.0-r0"]
-			},
-			dagger.#Exec & {
-				args: ["apk", "add", "-U", "--no-cache", "yarn=1.22.10-r0"]
 			},
 			dagger.#Exec & {
 				args: ["yarn", "global", "add", "netlify-cli@2.47.0"]

stdlib/yarn/yarn.cue

@@ -2,6 +2,7 @@ package yarn
 
 import (
 	"dagger.io/dagger"
+	"dagger.io/alpine"
 )
 
 // Yarn Script
@@ -20,14 +21,11 @@ import (
 	env?: [string]: string
 
 	#dagger: compute: [
-		dagger.#FetchContainer & {
+		dagger.#Load & {
-			ref: "alpine@sha256:08d6ca16c60fe7490c03d10dc339d9fd8ea67c6466dea8d558526b1330a85930"
+			from: alpine.#Image & {
-		},
+				package: bash: "=5.1.0-r0"
-		dagger.#Exec & {
+				package: yarn: "=1.22.10-r0"
-			args: ["apk", "add", "-U", "--no-cache", "bash=5.1.0-r0"]
+			}
-		},
-		dagger.#Exec & {
-			args: ["apk", "add", "-U", "--no-cache", "yarn=1.22.10-r0"]
 		},
 		dagger.#Exec & {
 			args: [