chore: add gitguardian security check and limit deployment to test se…

…rvers to only develop branch

Signed-off-by: Otieno Calvine <nyarangaotieno@gmail.com>

.github/workflows/deployment.yaml

@@ -1,6 +1,11 @@
 name: Deployment
 
-on: [push]
+on: 
+  push:
+    branches: [develop]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [develop]
 
 concurrency:
   group: build_and_push_image

.github/workflows/gitguardian.yaml

@@ -0,0 +1,21 @@
+name: GitGuardian scan
+
+on: [push, pull_request]
+
+jobs:
+  scanning:
+    name: GitGuardian scan
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0 # fetch all history so multiple commits can be scanned
+      - name: GitGuardian scan
+        uses: GitGuardian/gg-shield-action@master
+        env:
+          GITHUB_PUSH_BEFORE_SHA: ${{ github.event.before }}
+          GITHUB_PUSH_BASE_SHA: ${{ github.event.base }}
+          GITHUB_PULL_BASE_SHA: ${{ github.event.pull_request.base.sha }}
+          GITHUB_DEFAULT_BRANCH: ${{ github.event.repository.default_branch }}
+          GITGUARDIAN_API_KEY: ${{ secrets.GITGUARDIAN_API_KEY }}