implemented services unix and npipe complete with test

Signed-off-by: Richard Jones <richard@dagger.io>

tests/plan.bats

@@ -7,6 +7,12 @@ setup() {
 @test "plan: hello" {
   # Europa loader handles the cwd differently, therefore we need to CD into the tree at or below the parent of cue.mod
   cd "$TESTDIR"
-  run "$DAGGER" --europa up ./plan/hello-europa
-  assert_success
+  "$DAGGER" --europa up ./plan/hello-europa
+}
+
+@test "plan: unix socket" {
+  cd "$TESTDIR"
+  "$DAGGER" --europa up ./plan/hello-europa
+  run curl http://localhost:8080
+  assert_output --partial "<title>Hello World</title>"
 }