README.md

@@ -55,6 +55,8 @@ name: ci
 
 on:
   push:
+    branches:
+      - 'main'
 
 jobs:
   docker:
@@ -92,6 +94,11 @@ expression `{{defaultContext}}`. Here we can use it to provide a subdirectory
 to the default Git context:
 
 ```yaml
+      -
+        # Setting up Docker Buildx with docker-container driver is required
+        # at the moment to be able to use a subdirectory with Git context
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
       -
         name: Build and push
         uses: docker/build-push-action@v6
@@ -124,6 +131,8 @@ name: ci
 
 on:
   push:
+    branches:
+      - 'main'
 
 jobs:
   docker:
@@ -195,7 +204,7 @@ For more information about summaries, refer to the
 
 ### inputs
 
-The following inputs can be used as `step.with` keys:
+Following inputs can be used as `step.with` keys
 
 > `List` type is a newline-delimited string
 > ```yaml