chore: add build workflows for beta/release (#144)

- feat: add GitHub workflows for building Docker images for beta and release
- fix: update notify workflow to trigger on version tags

.github/workflows/beta-build.yml

@@ -0,0 +1,51 @@
+name: Build Beta Docker Image
+
+on:
+    push:
+        branches:
+            - dev
+    pull_request:
+        branches:
+            - dev
+
+jobs:
+    build:
+        runs-on: ubuntu-latest
+        steps:
+            - name: Checkout code
+              uses: actions/checkout@v4
+
+            - name: Set up Node.js
+              uses: actions/setup-node@v4
+              with:
+                  node-version: '18'
+
+            - name: Build frontend
+              working-directory: ./frontend
+              run: |
+                  npm ci
+                  npm run build
+
+            - name: Prepare dist directory
+              run: |
+                  mkdir -p dist/backend dist/static
+                  cp -r frontend/dist/* dist/static/
+                  cp -r backend/* dist/backend/
+                  cp backend/requirements.txt dist/
+
+            - name: Set up Docker Buildx
+              uses: docker/setup-buildx-action@v3
+
+            - name: Login to Docker Hub
+              if: github.event_name != 'pull_request'
+              uses: docker/login-action@v3
+              with:
+                  username: ${{ secrets.DOCKERHUB_USERNAME }}
+                  password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+            - name: Build and push
+              uses: docker/build-push-action@v5
+              with:
+                  context: .
+                  push: ${{ github.event_name != 'pull_request' }}
+                  tags: santiagosayshey/profilarr:beta