updated dockerfile

Dockerfile

@@ -1,25 +1,19 @@
-FROM node:latest as builder
-
+# ---- Base Node ----
+FROM node:14 AS base
 WORKDIR /app
 
+# ---- Dependencies ----
+FROM base AS dependencies
+COPY package*.json ./
+RUN npm ci
 COPY . .
 
-RUN yarn install --frozen-lockfile
-RUN yarn build
+# ---- Build ----
+FROM dependencies AS build
+RUN npm run build
 
-FROM node:alpine
-
-WORKDIR /app
-
-COPY --from=builder /app/package.json /app/yarn.lock ./
-COPY --from=builder /app/build ./
-
-RUN yarn install --frozen-lockfile --production
-
-RUN apk add curl
-HEALTHCHECK --interval=30s --timeout=30s --start-period=5s --retries=3\
- CMD [ "curl", "--fail", "--silent", "--output", "/dev/null", "localhost:3000/api/health" ]
-
-EXPOSE 3000
-
-CMD ["node", "./index.js"]
+# --- Release with Nginx ----
+FROM nginx:1.16.0-alpine AS release
+COPY --from=build /app/build /usr/share/nginx/html/
+EXPOSE 80
+CMD ["nginx", "-g", "daemon off;"]