fix: rework Dockerfile to reduce image size

.dockerignore

@@ -1,7 +1,11 @@
 node_modules
 .git
 .gitignore  
+.dockerignore
 .pre-commit-config.yaml
 .prettierrc.json
 .env.local
-.next
+.next
+Dockerfile
+docker-compose.yml
+README.md

Dockerfile

@@ -1,8 +1,33 @@
-FROM node:18-bookworm-slim
+FROM node:18-bookworm-slim as base
+
+# build stage
+FROM base AS deps
+
+WORKDIR /app
+
+COPY package.json package-lock.json ./
+
+RUN npm ci --only=production
+
+FROM base AS builder
+
+WORKDIR /app
+
+COPY --from=deps /app/node_modules ./node_modules
+
+COPY . .
+
+RUN sed -i "s/images:/output: 'standalone',images:/" next.config.js
+
+RUN npm run build
+
+# run stage
+FROM base AS runner
+
+ENV NODE_ENV production
 
 RUN apt-get update && apt-get install -y \
-    curl git jq jc borgbackup openssh-server sudo cron && \
-    apt-get upgrade -y && \
+    curl jq jc borgbackup openssh-server sudo cron && \
     apt-get clean && rm -rf /var/lib/apt/lists/*
 
 RUN echo "borgwarehouse ALL=(ALL) NOPASSWD: /usr/sbin/service ssh restart" >> /etc/sudoers
@@ -17,18 +42,16 @@ RUN cp /etc/ssh/sshd_config /etc/ssh/moduli /home/borgwarehouse/
 
 WORKDIR /home/borgwarehouse/app
 
-COPY . .
-
-RUN chown -R borgwarehouse:borgwarehouse * .*
+COPY --from=builder --chown=borgwarehouse:borgwarehouse /app/docker-bw-init.sh /app/LICENSE ./
+COPY --from=builder --chown=borgwarehouse:borgwarehouse /app/helpers/shells ./helpers/shells
+COPY --from=builder --chown=borgwarehouse:borgwarehouse /app/.next/standalone ./
+COPY --from=builder --chown=borgwarehouse:borgwarehouse /app/public ./public
+COPY --from=builder --chown=borgwarehouse:borgwarehouse /app/.next/static ./.next/static
 
 USER borgwarehouse
 
-RUN npm ci --only=production
-
-RUN npm run build
-
 EXPOSE 3000 22
 
 ENTRYPOINT ["./docker-bw-init.sh"]
 
-CMD ["npm", "run", "start"]
+CMD ["node", "server.js"]