fix(docker): Ensure public dir exists in Next.js builds + Hetzner compose fixes

- admin-compliance/Dockerfile: mkdir -p public before build
- developer-portal/Dockerfile: mkdir -p public before build
  (fixes "failed to calculate checksum /app/public: not found")
- docker-compose.hetzner.yml: Override core-health-check to exit
  immediately (Core doesn't run on Hetzner)
- Network override: external:false (auto-create breakpilot-network)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

admin-compliance/Dockerfile

@@ -22,6 +22,9 @@ ENV NEXT_PUBLIC_API_URL=$NEXT_PUBLIC_API_URL
 ENV NEXT_PUBLIC_OLD_ADMIN_URL=$NEXT_PUBLIC_OLD_ADMIN_URL
 ENV NEXT_PUBLIC_SDK_URL=$NEXT_PUBLIC_SDK_URL
 
+# Ensure public directory exists (Next.js standalone needs it)
+RUN mkdir -p public
+
 # Build the application
 RUN npm run build
 

developer-portal/Dockerfile

@@ -12,6 +12,9 @@ RUN npm install
 # Copy source code
 COPY . .
 
+# Ensure public directory exists
+RUN mkdir -p public
+
 # Build the application
 RUN npm run build