ci(actions): set up automated deploys using github actions

Signed-off-by: Amogh Lele <amogh@dyte.io>

.github/workflows/fly.yml

@@ -0,0 +1,12 @@
+name: Fly Deploy
+on: [push]
+env:
+  FLY_API_TOKEN: ${{ secrets.FLY_API_TOKEN }}
+jobs:
+  deploy:
+      name: Deploy to fly.io
+      runs-on: ubuntu-latest
+      steps:
+        - uses: actions/checkout@v2
+        - uses: superfly/flyctl-actions/setup-flyctl@master
+        - run: flyctl deploy --remote-only