fix: Replace curl with wget in health checks and add wget to Dockerfiles

- Alpine Linux doesn't include curl by default
- Use wget with --spider flag for health checks
- Add wget installation to all Dockerfiles
- This should resolve container health check failures

admin/Dockerfile

@@ -1,8 +1,8 @@
 # Admin Dockerfile - Vue 3 Admin Dashboard
 FROM node:20-alpine
 
-# Install git for npm dependencies
-RUN apk add --no-cache git
+# Install git and wget for npm dependencies and health checks
+RUN apk add --no-cache git wget
 
 # Set working directory
 WORKDIR /app