ci(docker): use more approriate imgs (#1738)

Small without browsers where that's enough bigger with browsers where
it's actually needed.

.circleci/config.yml

@@ -1,13 +1,21 @@
-# Javascript Node CircleCI 2.0 configuration file
-#
-# Check https://circleci.com/docs/2.0/language-javascript/ for more details
-#
 version: 2.1
 
 executors:
   node:
+    docker:
+      - image: cimg/node:17.7.2
+    resource_class: small
+    working_directory: ~/repo
+    environment:
+      GIT_AUTHOR_EMAIL: [email protected]
+      GIT_AUTHOR_NAME: vis-bot
+      GIT_COMMITTER_EMAIL: [email protected]
+      GIT_COMMITTER_NAME: vis-bot
+
+  node-browsers:
     docker:
       - image: cimg/node:17.7.2-browsers
+    resource_class: "medium"
     working_directory: ~/repo
     environment:
       GIT_AUTHOR_EMAIL: [email protected]
@@ -50,7 +58,7 @@ jobs:
             - "repo/styles"
 
   examples:
-    executor: node
+    executor: node-browsers
 
     steps:
       - attach_workspace:
@@ -87,7 +95,7 @@ jobs:
       - run: npm run test:unit
 
   test_e2e_functional:
-    executor: node
+    executor: node-browsers
 
     steps:
       - attach_workspace:
@@ -96,7 +104,7 @@ jobs:
       - run: npm run test:e2e:functional
 
   test_e2e_visual:
-    executor: node
+    executor: node-browsers
 
     steps:
       - attach_workspace: