fix: Resolve Docker build failure by installing dev dependencies

- Change npm ci to install all dependencies (including devDependencies) during build stage
- Run npm ci --only=production after build to minimize final image size
- Fix CMD instruction to use JSON format (resolves Docker warning)

class-variance-authority, tailwindcss, postcss, and other build tools are required during the build process and were missing when using --only=production flag initially.

🤖 Generated with Claude Code

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

dashboard-sqdc/Dockerfile

@@ -8,8 +8,8 @@ WORKDIR /app
 # Copy package files
 COPY package*.json ./
 
-# Install dependencies
-RUN npm ci --only=production
+# Install all dependencies (including dev) needed for build
+RUN npm ci
 
 # Copy source code
 COPY . .
@@ -17,6 +17,9 @@ COPY . .
 # Build the application
 RUN npm run build
 
+# Install only production dependencies for runtime
+RUN npm ci --only=production
+
 # Stage 2: Production image with Nginx
 FROM nginx:alpine
 
@@ -43,4 +46,4 @@ HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
   CMD wget --no-verbose --tries=1 --spider http://localhost/ || exit 1
 
 # Start both nginx and the API server
-CMD sh -c "node /app/server.js & nginx -g 'daemon off;'"
+CMD ["sh", "-c", "node /app/server.js & nginx -g 'daemon off;'"]