Europa: integrate core packages, separate universe

Signed-off-by: Solomon Hykes <solomon@dagger.io>

europa-universe/alpine/tests/simple/simple.cue

@@ -0,0 +1,38 @@
+package alpine
+
+import (
+	"universe.dagger.io/docker"
+)
+
+TestImageVersion: {
+	build: #Build & {
+		// install an old version on purpose
+		version: "3.10.9"
+	}
+
+	check: docker.#Run & {
+		image: build.output
+		output: files: "/etc/alpine-release": contents: "3.10.9"
+	}
+}
+
+TestPackageInstall: {
+	build: #Build & {
+		packages: {
+			jq: {}
+			curl: {}
+		}
+	}
+
+	check: docker.#Run & {
+		script: """
+			jq --version > /jq-version.txt
+			curl --version > /curl-version.txt
+			"""
+
+		output: files: {
+			"/jq-version.txt": contents:   "FIXME"
+			"/curl-version.txt": contents: "FIXME"
+		}
+	}
+}