📦 Improve docker build process

Reduce docker image size

.changeset/wicked-colts-fail.md

@@ -0,0 +1,6 @@
+---
+"socialify": patch
+---
+
+Improve docker build process
+Reduce docker image size

.dockerignore

@@ -33,4 +33,5 @@ yarn-error.log*
 
 .dockerignore
 Dockerfile
-.*
+.*
+*.md

Dockerfile

@@ -1,24 +1,52 @@
-# Source: https://github.com/vercel/next.js/blob/2161d8c012dcd98eb8690814bd275d56c45bf00a/examples/with-docker/Dockerfile
-
 FROM node:22-alpine AS base
 
+# Stage 1: Install dependencies
+FROM base AS deps
+WORKDIR /app
+COPY package.json yarn.lock ./
+# postinstall script requires a public directory
+RUN mkdir -p /app/public && \
+  yarn install --frozen-lockfile
+
+# Stage 2: Build the application
+FROM base AS builder
+
+ENV NODE_ENV=production
+ENV CI=true
+ENV NEXT_TELEMETRY_DISABLED=1
+
+WORKDIR /app
+
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+COPY --from=deps /app/public ./public
+
+RUN yarn build
+
+# Stage 3: Prepare the production image
+FROM base AS runner
+
 ENV GITHUB_TOKEN=
 ENV PROJECT_URL=http://localhost:3000
 ENV GTM_ID=
+
 ENV PORT=3000
 ENV NODE_ENV=production
+ENV CI=true
 ENV NEXT_TELEMETRY_DISABLED=1
 
 WORKDIR /app
 
-COPY package.json yarn.lock* ./
-COPY public ./public/
-RUN yarn --frozen-lockfile
+# Copy only the necessary files and install production dependencies
+COPY package.json yarn.lock ./
+RUN mkdir -p /app/public && \
+  yarn install --production --frozen-lockfile && \
+  yarn cache clean
 
-COPY . .
-
-RUN yarn build
-
-CMD ["yarn", "start"]
+COPY --from=builder /app/.next ./.next
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/next.config.js /app/custom-rewrites.js ./
 
 EXPOSE 3000
+
+CMD ["yarn", "start"]