fix: yarn instead of npm for dockerfile

.dockerignore

@@ -6,3 +6,5 @@ node_modules
 README.md
 Dockerfile
 .dockerignore
+.yarn
+.pnp.*

Dockerfile

@@ -1,14 +1,16 @@
 FROM node:22-alpine AS deps
 WORKDIR /app
-COPY package.json package-lock.json* ./
+RUN corepack enable
-RUN npm ci
+COPY package.json yarn.lock .yarnrc.yml ./
+RUN yarn install --immutable
 
 FROM node:22-alpine AS builder
 WORKDIR /app
+RUN corepack enable
 COPY --from=deps /app/node_modules ./node_modules
 COPY . .
 ENV NEXT_TELEMETRY_DISABLED=1
-RUN npm run build
+RUN yarn build
 
 FROM node:22-alpine AS runner
 WORKDIR /app