add build deploy to github workflows

.github/workflows/build_deploy.yml

@@ -0,0 +1,36 @@
+name: odin-battleship-fly
+on:
+  push:
+    branches:
+      - main
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Login to docker hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build the image and push it to Docker Hub
+        uses: docker/build-push-action@v5
+        with:
+          push: true
+          tags: mantesso/odin-battleship:ex_3.2
+
+  deploy:
+    needs: build
+    name: odin-battleship-fly
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: superfly/flyctl-actions/setup-flyctl@master
+      - run: flyctl deploy --remote-only
+        env:
+          FLY_API_TOKEN: ${{ secrets.FLY_API_TOKEN }}
+
+