create dagger

dagger/.gitignore

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+cue.mod

dagger/Dockerfile

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+FROM alpine

dagger/app.cue

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+package app
+
+import (
+	"dagger.io/dagger"
+	"dagger.io/dagger/core"
+)
+
+dagger.#Plan & {
+	client: {
+		filesystem: {
+			".": read: contents: dagger.#FS
+		}
+	}
+	actions: {
+		docker: core.#Dockerfile & {
+			source: client.filesystem.".".read.contents
+		}
+		hello: core.#Exec & {
+			input: docker.output
+			args: ["echo", "Hello, World!"]
+			always: true
+		}
+	}
+}