Add github action

.github/workflows/aws-costs.yml

@@ -0,0 +1,19 @@
+name: Sends Daily AWS Costs to Slack
+on:
+  # Allow manual Run
+  workflow_dispatch:
+  # Run at 7:00 UTC every day
+  schedule:
+    - cron: "0 7 * * *"
+jobs:
+  aws_costs:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Get Costs
+        env:
+          AWS_KEY: ${{ COST_AWS_ACCESS_KEY }}
+          AWS_SECRET: ${{ COST_AWS_SECRET_KEY }}
+          AWS_REGION: ${{ COST_AWS_REGION }}
+        run: |
+          npm install -g aws-cost-cli
+          aws-cost -k $AWS_KEY -s $AWS_SECRET -r $AWS_REGION