feat: add multi-environment deployment with Gitea Actions & Dokploy

- Update Gitea workflow to build dev/staging/main branches
- Create environment-specific docker-compose files
  - docker-compose.dev.yml (pulls dev image)
  - docker-compose.staging.yml (pulls staging image)
  - docker-compose.prod.yml (pulls latest image)
  - docker-compose.local.yml (builds locally for development)
- Remove generic docker-compose.yml (replaced by env-specific files)
- Update .dockerignore to exclude docs/ and .gitea/ from production images
- Add comprehensive deployment guide (docs/DOKPLOY_DEPLOYMENT.md)

Image Tags:
- dev branch → :dev
- staging branch → :staging
- main branch → :latest
- All branches → :{branch}-{sha}

Benefits:
- Separate deployments for dev/staging/prod
- Automated CI/CD via Gitea Actions + Dokploy webhooks
- Leaner production images (excludes dev tools/docs)
- Local development support (docker-compose.local.yml)
- Rollback support via SHA-tagged images

.gitea/workflows/docker-publish.yaml

@@ -3,10 +3,14 @@ name: Build and Push Docker Image
 on:
   push:
     branches:
+      - dev
+      - staging
       - main
     paths:
       - 'src/**'
+      - 'client/**'
       - 'Dockerfile'
+      - 'package.json'
       - '.gitea/workflows/**'
   workflow_dispatch:
 
@@ -41,8 +45,10 @@ jobs:
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           tags: |
-            type=raw,value=latest,enable={{is_default_branch}}
-            type=sha,prefix=
+            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
+            type=raw,value=dev,enable=${{ github.ref == 'refs/heads/dev' }}
+            type=raw,value=staging,enable=${{ github.ref == 'refs/heads/staging' }}
+            type=sha,prefix={{branch}}-
 
       - name: Build and push Docker image
         uses: docker/build-push-action@v5