Add Ember instance types for DANDI CLI

By adding an ember instance type (and ember-staging), the DANDI CLI
should be able to be used as-is rather than requiring a custom PyPI.

#1517
#1527

dandi/cli/tests/test_instances.py

@@ -25,4 +25,10 @@ def test_cmd_instances(monkeypatch):
         "linc-staging:\n"
         "  api: https://staging-api.lincbrain.org/api\n"
         "  gui: https://staging.lincbrain.org\n"
+        "ember:\n"
+        "  api: https://api.ember-archive.org/api\n"
+        "  gui: https://ember-archive.org\n"
+        "ember-staging:\n"
+        "  api: https://staging-api.ember-archive.org/api\n"
+        "  gui: https://staging.ember-archive.org\n"
     )

dandi/consts.py

@@ -141,7 +141,17 @@ def urls(self) -> Iterator[str]:
         "linc-staging",
         "https://staging.lincbrain.org",
         "https://staging-api.lincbrain.org/api",
-    )
+    ),
+    "ember": DandiInstance(
+        "ember",
+        "https://ember-archive.org",
+        "https://api.ember-archive.org/api",
+    ),
+    "ember-staging": DandiInstance(
+        "ember-staging",
+        "https://staging.ember-archive.org",
+        "https://staging-api.ember-archive.org/api",
+    ),
 }
 # to map back url: name
 known_instances_rev = {

docs/source/cmdline/instances.rst

@@ -27,4 +27,10 @@ Example output:
       gui: https://staging.lincbrain.org
     linc:
       api: https://api.lincbrain.org/api
-      gui: https://lincbrain.org
+      gui: https://lincbrain.org
+    ember-staging:
+      api: https://staging-api.ember-archive.org/api
+      gui: https://staging.ember-archive.org
+    ember:
+      api: https://api.ember-archive.org/api
+      gui: https://ember-archive.org