feat: change default port to 3030

Dockerfile

@@ -11,10 +11,10 @@ RUN npm install --production && npm cache clean --force
 COPY server.js ./
 COPY public/ ./public/
 
-EXPOSE 3000
+EXPOSE 3030
 
 HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
-  CMD wget -qO- http://localhost:3000/api/config || exit 1
+  CMD wget -qO- http://localhost:3030/api/config || exit 1
 
 RUN addgroup -g 1001 -S appgroup && \
     adduser -S appuser -u 1001 -G appgroup