refactor: create docker-stack workspace for deployment configs

Created dedicated workspace for Docker deployment configurations and scripts.
Improves organization by grouping all deployment-related files together.

## New Structure
- docker-stack/: Docker Compose files and deployment scripts
  - docker-compose-standalone.yaml
  - docker-compose-swarm.yml
  - docker-compose-debug.yml
  - deploy-standalone.sh
  - deploy-swarm.sh
  - README.md (deployment documentation)
  - package.json

## Changes
- Moved all docker-compose YAML files to docker-stack/
- Moved deploy scripts to docker-stack/
- Updated VS Code workspace to include docker-stack
- Updated documentation (README, CLAUDE.md)

## Deployment Workflow
1. Build: `cd web-app && ./build.sh 2.20.0`
2. Deploy: `cd docker-stack && ./deploy-standalone.sh 2.20.0`

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

docker-stack/docker-compose-swarm.yml

@@ -0,0 +1,81 @@
+# this compose file runs Postgres db and exposes it's port to the host machine
+version: "3.7"
+
+networks:
+  traefik-network:
+    name: "traefik-network"
+    external: true
+  util-bills-mongo-network:
+    name: "util-bills-mongo-network"
+    attachable: false
+    external: false
+    internal: true # bridge network, isolated from host and other networks
+
+services:
+  web-app:
+    image: utility-bills-tracker:${IMAGE_VERSION}
+    networks:
+      - traefik-network
+      - util-bills-mongo-network
+    volumes:
+      - ./web-app/etc/hosts/:/etc/hosts
+    environment:
+      MONGODB_URI: mongodb://rezije.app:w4z4piJBgCdAm4tpawqB@mongo:27017/utility-bills
+      GOOGLE_ID: 355397364527-adjrokm6hromcaaar0qfhk050mfr35ou.apps.googleusercontent.com
+      GOOGLE_SECRET: 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
+      AUTH_SECRET: Gh0jQ35oq6DR8HkLR3heA8EaEDtxYN/xkP6blvukZ0w=
+      LINKEDIN_ID: 776qlcsykl1rag
+      LINKEDIN_SECRET: ugf61aJ2iyErLK40
+      HOSTNAME: rezije.app # IP address at which the server will be listening (0.0.0.0 = listen on all addresses)
+      NEXTAUTH_URL: https://rezije.app # URL next-auth will use while redirecting user during authentication (if not set - will use HOSTNAME)
+      PORT: ${PORT:-80}
+      # Share link security
+      SHARE_LINK_SECRET: ef68362357315d5decb27d24ff9abdb4a02a3351cd2899f79bf238dce0fe08c5
+      SHARE_TTL_INITIAL_DAYS: 10
+      SHARE_TTL_AFTER_VISIT_HOURS: 1
+      # Upload rate limiting
+      UPLOAD_RATE_LIMIT_PER_IP: 5
+      UPLOAD_RATE_LIMIT_WINDOW_MS: 3600000
+    deploy:
+      # u slucaju rušenja kontejnera čekamo 5s i dižemo novi kontejner => ako se i on sruši opet ceka 5s i pokusava ponovno (tako 5 puta)
+      restart_policy:
+        condition: any
+        delay: 5s
+        max_attempts: 0 # u slučaju rušenja containera pokušavaj ga pokrenuti dok ne uspije = BESKONAČNO
+      labels:
+        - traefik.enable=true
+        - traefik.docker.network=traefik-network # mreže preko koje ide komunikacija sa Traefikom
+        - traefik.http.services.web-app.loadbalancer.server.port=80
+        - traefik.http.routers.web-app.entrypoints=http
+        - traefik.http.routers.web-app.rule=Host(`${FQDN:-rezije.app}`)
+  mongo:
+    image: mongo:4.4.27
+    environment:
+      MONGO_INITDB_ROOT_USERNAME: root
+      MONGO_INITDB_ROOT_PASSWORD: example
+    volumes:
+      - ./mongo-volume:/data/db
+    networks:
+      - util-bills-mongo-network
+  mongo-express:
+    image: mongo-express
+    environment:
+      ME_CONFIG_MONGODB_ADMINUSERNAME: root
+      ME_CONFIG_MONGODB_ADMINPASSWORD: HjktJCPWMBtM1ACrDaw7
+      ME_CONFIG_MONGODB_URL: mongodb://root:HjktJCPWMBtM1ACrDaw7@mongo:27017/
+    networks:
+      - traefik-network
+      - util-bills-mongo-network
+    deploy:
+      # u slucaju rušenja kontejnera čekamo 5s i dižemo novi kontejner => ako se i on sruši opet ceka 5s i pokusava ponovno (tako 5 puta)
+      restart_policy:
+        condition: any
+        delay: 5s
+        max_attempts: 0 # u slučaju rušenja containera pokušavaj ga pokrenuti dok ne uspije = BESKONAČNO
+      labels:
+        - traefik.enable=true
+        - traefik.docker.network=traefik-network # mreže preko koje ide komunikacija sa Traefikom
+        - traefik.http.services.mongo-express.loadbalancer.server.port=8081
+        - traefik.http.routers.mongo-express.entrypoints=http
+        - traefik.http.routers.mongo-express.rule=Host(`mongo.rezije.app`)
+