add ui/dist to .gitignore. change dockerfile to build front.

Dockerfile_build

@@ -1,11 +1,24 @@
-FROM golang:1.22-alpine as builder
+FROM node:20-alpine3.19 AS front-builder
+
+WORKDIR /app
+
+COPY . /app/
+
+RUN \
+  cd /app/ui && \
+  npm install && \
+  npm run build
+
+FROM golang:1.22-alpine AS builder
 
 WORKDIR /app
 
 COPY ../. /app/
 
-RUN go build -o certimate
+RUN rm -rf /app/ui/dist
+COPY --from=front-builder /app/ui/dist /app/ui/dist
 
+RUN go build -o certimate
 
 FROM alpine:latest