chore(deps): Bump nginx from 1.29-alpine to 1.29.8-alpine in /docker (#45)

Bumps nginx from 1.29-alpine to 1.29.8-alpine.

---
updated-dependencies:
- dependency-name: nginx
  dependency-version: 1.29.8-alpine
  dependency-type: direct:production
...

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docker/Dockerfile.frontend

@@ -22,7 +22,7 @@ COPY frontend/ ./frontend/
 RUN cd frontend && pnpm run build
 
 # Production stage - using minimal nginx
-FROM nginx:1.29-alpine
+FROM nginx:1.29.8-alpine
 
 # Create non-root user for nginx (or use existing nginx user)
 # nginx:alpine already has nginx user/group, so we'll just use it