More adjusts in actions

.github/workflows/main.yml

@@ -2,7 +2,12 @@ name: Build image
 
 # Controls when the workflow will run
 on:
-  
+
+  # Push only in dev  
+  push:
+    branches:
+      - dev
+
   # When a release is published
   release:
     types: [published]
@@ -34,7 +39,7 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y libelf-dev
+          sudo apt-get install -y libelf-dev qemu-utils
 
       # Prepare buildroot for first make (for cache)
       - name: Prepare buildroot