Adding CODEOWNERS, fixing first interaction for contributers and addi…

…ng unathorized code check in PR (#196)

* Update pull-requests.yml

* Create pull-request-target.yml

* Create authorized-changes-detection.yml

* Create CODEOWNERS

.github/workflows/authorized-changes-detection.yml

@@ -0,0 +1,13 @@
+name: Checking workflow files
+on:
+  pull_request:
+    paths:
+      - '.github/**'     
+
+jobs:
+  Checking-for-unauthorized-file-changes:
+    name: Checking for unauthorized file changes
+    runs-on: ubuntu-latest
+    steps:
+      - name: Unauthorized file modification in PR
+        run: exit 1

.github/workflows/pull-request-target.yml

@@ -0,0 +1,16 @@
+name: PR target workflow
+on: 
+  pull_request_target:
+
+jobs:
+  PR-Greeting:
+    name: Greeting Message to user
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/first-interaction@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          pr-message: "Congratulations on making your first PR! :confetti_ball: If you haven't already, check out our [Contributing Guidelines](https://github.com/PalisadoesFoundation/talawa/blob/master/CONTRIBUTING.md) and [PR Reporting Guidelines](https://github.com/PalisadoesFoundation/talawa/blob/master/PR-guidelines.md) to ensure that you are following our guidelines for contributing and creating PR."
+
+

.github/workflows/pull-requests.yml

@@ -4,19 +4,10 @@ on:
     branches:
       - '**'
 jobs:
-  PR-Greeting:
-    name: Greeting Message to user
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/first-interaction@v1
-        with:
-          repo-token: ${{ secrets.GITHUB_TOKEN }}
-          pr-message: "Congratulations on making your first PR! :confetti_ball: If you haven't already, check out our [Contributing Guidelines](https://github.com/PalisadoesFoundation/talawa/blob/master/CONTRIBUTING.md) and [PR Reporting Guidelines](https://github.com/PalisadoesFoundation/talawa/blob/master/PR-guidelines.md) to ensure that you are following our guidelines for contributing and creating PR."
-
+
   Linter:
     name: Lints the code
     runs-on: ubuntu-latest
-    needs: PR-Greeting
     steps:
       - uses: actions/checkout@v2
       - name: Install Dependencies

CODEOWNERS

@@ -0,0 +1,2 @@
+/.github/ @palisadoes
+CODEOWNERS @palisadoes