Adding SDLC workflows

automation/greetings.properties.json

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+{
+    "name": "Greetings",
+    "description": "Greets users who are first time contributers to the repo",
+    "iconName": "blank",
+    "categories": ["Automation", "SDLC"]
+}

automation/greetings.yml

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+name: Greetings
+
+on: [pull_request, issue]
+
+jobs:
+  greeting:
+    runs-on: ubuntu-latest
+    steps:
+      steps:
+      - uses: actions/first-interaction@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          issue-message: 'Message that will be displayed on users'' first issue'
+          pr-message: 'Message that will be displayed on users'' first pr'

automation/label.properties.json

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+{
+    "name": "Labeler",
+    "description": "Labels pull requests based on the files changed",
+    "iconName": "blank",
+    "categories": ["Automation", "SDLC"]
+}

automation/label.yml

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+name: Labeler
+on: [pull-request]
+
+jobs:
+  label:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/labeler@v2
+      with:
+        repo-token: "${{ secrets.GITHUB_TOKEN }}"