Some shellcheck fixes and new input (#1)

action.yml

@@ -19,6 +19,10 @@ inputs:
     required: false
     description: 'The path where to save the linting results to'
     default:
+  results-to-console:
+    required: false
+    description: 'The flag to print Hadolint results to console'
+    default: false
 
   # standart hadolint options:
   no-color:
@@ -95,6 +99,7 @@ runs:
     HADOLINT_CONFIG: ${{ inputs.config }}
     HADOLINT_RECURSIVE: ${{ inputs.recursive }}
     HADOLINT_OUTPUT: ${{ inputs.output-file }}
+    HADOLINT_RESULTS_TO_CONSOLE: ${{ inputs.results-to-console }}
 branding:
   icon: 'layers'
   color: 'purple'