ci: run on pull_request

Author: joelgallant

.github/workflows/cypress.yml

@@ -1,8 +1,9 @@
 name: cypress
 
 on:
-  push:
-    branches: '**'
+  - pull_request
+  - push:
+      branches: '**'
 
 jobs:
   all:

.github/workflows/docker-image.yml

@@ -1,9 +1,10 @@
 name: docker-image
 
 on:
-  push:
-    branches: 'master'
-    tags: '*'
+  - pull_request
+  - push:
+      branches: 'master'
+      tags: '*'
 
 jobs:
   publish:

.github/workflows/main.yml

@@ -1,8 +1,9 @@
 name: main
 
 on:
-  push:
-    branches: '**'
+  - pull_request
+  - push:
+      branches: '**'
 
 jobs:
   # for branches, we only need to check Linux + Node LTS