Improve #docker.Push definition :

- Push to private registry
- Output ref and digest
- Update doc
- Add tests to universe.bats

Signed-off-by: Tom Chauveau <tom.chauveau@epitech.eu>

stdlib/.dagger/env/docker-push/.gitignore

@@ -0,0 +1,2 @@
+# dagger state
+state/**

stdlib/.dagger/env/docker-push/plan/push.cue

@@ -0,0 +1,63 @@
+package docker
+
+import (
+	"dagger.io/dagger/op"
+	"dagger.io/dagger"
+	"dagger.io/docker"
+	"dagger.io/alpine"
+	"dagger.io/random"
+)
+
+TestRegistry: {
+	username: string         @dagger(input)
+	secret:   dagger.#Secret @dagger(input)
+}
+
+#TestGetSecret: {
+	secret: dagger.#Artifact
+
+	out: {
+		string
+
+		#up: [
+			op.#Load & {from: alpine.#Image},
+
+			op.#Exec & {
+				always: true
+				args: ["sh", "-c", "cp /input/secret /secret"]
+				mount: "/input/secret": "secret": secret
+			},
+
+			op.#Export & {
+				source: "/secret"
+			},
+		]
+	}
+}
+
+TestPush: {
+	tag: random.#String & {seed: "docker push and pull"}
+
+	name: "daggerio/ci-test:\(tag.out)"
+
+	secret: #TestGetSecret & {
+		secret: TestRegistry.secret
+	}
+
+	image: docker.#ImageFromDockerfile & {
+		dockerfile: """
+				FROM alpine
+				RUN echo "test" > /test.txt
+			"""
+		context: ""
+	}
+
+	push: docker.#Push & {
+		"name": name
+		source: image
+		registry: {
+			username: TestRegistry.username
+			"secret": secret.out
+		}
+	}
+}

stdlib/.dagger/env/docker-push/values.yaml

@@ -0,0 +1,26 @@
+name: docker-push
+inputs:
+    TestRegistry.secret:
+        secret: ENC[AES256_GCM,data:ooc+0IjYtX9tkM7q1i4Ws6CorZsWtGQzHbjGx+j892iTZC7Q,iv:asdJzuRAHBRhD/FlkEd1VvX1tIz/qupBL7sMQWxZL5E=,tag:yuTyDx7hZeC+cmHx6tspmQ==,type:str]
+    TestRegistry.username:
+        text: daggertest
+sops:
+    kms: []
+    gcp_kms: []
+    azure_kv: []
+    hc_vault: []
+    age:
+        - recipient: age1gxwmtwahzwdmrskhf90ppwlnze30lgpm056kuesrxzeuyclrwvpsupwtpk
+          enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBrcnpRZ203QzhtKzc3bzF4
+            Y002V0JUUnNZMks2VS83SjBOdVZid1dxbTJjCmc5VGtvM3lOejEvQ3VMZ1ZyZElZ
+            Skd3ZWxRMHdQRHdtZFBYUFMweDFlL28KLS0tIHhHeUh4a2gvb2w3UTEyNFZaK0dS
+            UjFJYTc1UUUzSFVkZjQ2blRsSGpVdVEKOanMR3+WlAgoDfqTUW7WPW1ytT3NdkTX
+            4Rqo49QmnuKFJ9tKoBFQOqgIo8E/lpcOkeIUiy5e/35FvsZ/KFk/pg==
+            -----END AGE ENCRYPTED FILE-----
+    lastmodified: "2021-06-12T13:31:57Z"
+    mac: ENC[AES256_GCM,data:TrLGfqDj3lvZKroaPtlDuR0Ki+yoFDYFqIhW+g7iasVOzvDaqHepX8X/aLiHX+XHdTqGH6ehfu1k1BSaz6xKqqdIai9NIyokgIKXR1F5mRgK/aDhc6x/YvX3dSl79/4zBBblDpYNFhCarQMxeTSFP9GfW+e0+T/z10fHHlQub8o=,iv:Pab2qkZTqP/6j4LV0B97SACQm/UZPMkeahGjZLJ2fFg=,tag:r4IW1WRipuC/MdtwEzzEpA==,type:str]
+    pgp: []
+    encrypted_suffix: secret
+    version: 3.7.1