Fix public directory copy in Dockerfile - use trailing slashes

Dockerfile

@@ -10,13 +10,17 @@ RUN npm install --production
 
 # Copy application code
 COPY server.js ./
-COPY public ./public
 COPY migrations ./migrations
 
-# Create non-root user
+# Copy public directory explicitly
+COPY public/ ./public/
+
+# Create non-root user and fix permissions
 RUN addgroup -g 1001 -S nodejs && \
     adduser -S nodejs -u 1001 && \
-    chown -R nodejs:nodejs /app
+    chown -R nodejs:nodejs /app && \
+    ls -la /app && \
+    ls -la /app/public
 
 USER nodejs