Allow Github Actions executions from contributions PR

Signed-off-by: RouxAntoine <antoinroux@hotmail.fr>

Author: RouxAntoine

.github/workflows/build-test.yml

@@ -4,6 +4,8 @@ name: build-test
 # but not on master or tags
 # and only for Dockerfile related modifications
 on:
+  pull_request:
+    types: [ synchronize, opened, reopened, ready_for_review ]
   push:
     tags-ignore:
       - "**"

.github/workflows/lint-dockerfile.yml

@@ -4,6 +4,8 @@ name: lint-dockerfile
 # but not on master or tags
 # and only for Dockerfile related modifications
 on:
+  pull_request:
+    types: [ synchronize, opened, reopened, ready_for_review ]
   push:
     tags-ignore:
       - "**"
@@ -28,3 +30,4 @@ jobs:
         with:
           dockerfile: "Dockerfile"
           config: "hadolint.yaml"
+