ci: add build workflow for automatic image building

.forgejo/workflows/build.yaml

@@ -0,0 +1,57 @@
+name: Build and Push Images
+
+on:
+  push:
+    branches:
+      - dev
+    paths:
+      - 'backend/**'
+      - 'backoffice/**'
+      - 'frontend/**'
+      - 'seeder-api/**'
+
+env:
+  REGISTRY: forgejo-gru.rede5.com.br
+  NAMESPACE: rede5
+
+jobs:
+  build-push:
+    runs-on: docker
+    steps:
+      - name: Checkout code
+        uses: https://github.com/actions/checkout@v4
+
+      - name: Login to Forgejo Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ secrets.FORGEJO_USERNAME }}
+          password: ${{ secrets.FORGEJO_PASSWORD }}
+
+      - name: Build and Push Backend
+        uses: docker/build-push-action@v5
+        with:
+          context: ./backend
+          push: true
+          tags: ${{ env.REGISTRY }}/${{ env.NAMESPACE }}/gohorsejobs-backend:latest
+
+      - name: Build and Push Frontend
+        uses: docker/build-push-action@v5
+        with:
+          context: ./frontend
+          push: true
+          tags: ${{ env.REGISTRY }}/${{ env.NAMESPACE }}/gohorsejobs-frontend:latest
+
+      - name: Build and Push Backoffice
+        uses: docker/build-push-action@v5
+        with:
+          context: ./backoffice
+          push: true
+          tags: ${{ env.REGISTRY }}/${{ env.NAMESPACE }}/gohorsejobs-backoffice:latest
+
+      - name: Build and Push Seeder
+        uses: docker/build-push-action@v5
+        with:
+          context: ./seeder-api
+          push: true
+          tags: ${{ env.REGISTRY }}/${{ env.NAMESPACE }}/gohorsejobs-seeder:latest