dont do it on PRs

Author: Dominik Matić

.github/workflows/build_and_deploy.yml

@@ -2,8 +2,6 @@ name: Build the docker images and deploy
 on:
   push:
     branches: [ "master" ]
-  pull_request:
-    branches: [ "master" ]
 jobs:
   build_and_push_images:
     runs-on: ubuntu-latest