refactor: rename project from wedding-photo-sharing to PicPeak

- Update Docker image names and network configurations
- Rename package.json project names to picpeak-backend/frontend
- Update CI/CD configurations (Drone CI and GitHub Actions)
- Update documentation and setup scripts
- Update application branding in source code
- Change default database name to picpeak
- Update PM2 ecosystem config

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

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

.drone.yml

@@ -7,7 +7,7 @@ steps:
   - name: build-backend
     image: plugins/docker
     settings:
-      repo: registry.local.nothaft.cloud/wedding-photo-sharing-backend
+      repo: registry.local.nothaft.cloud/picpeak-backend
       tags: 
         - latest
         - ${DRONE_COMMIT_SHA:0:8}
@@ -19,7 +19,7 @@ steps:
   - name: build-frontend
     image: plugins/docker
     settings:
-      repo: registry.local.nothaft.cloud/wedding-photo-sharing-frontend
+      repo: registry.local.nothaft.cloud/picpeak-frontend
       tags: 
         - latest
         - ${DRONE_COMMIT_SHA:0:8}
@@ -45,7 +45,7 @@ steps:
   - name: build-backend-release
     image: plugins/docker
     settings:
-      repo: registry.local.nothaft.cloud/wedding-photo-sharing-backend
+      repo: registry.local.nothaft.cloud/picpeak-backend
       tags:
         - ${DRONE_TAG}
         - latest
@@ -57,7 +57,7 @@ steps:
   - name: build-frontend-release
     image: plugins/docker
     settings:
-      repo: registry.local.nothaft.cloud/wedding-photo-sharing-frontend
+      repo: registry.local.nothaft.cloud/picpeak-frontend
       tags:
         - ${DRONE_TAG}
         - latest