feat: update dockerfile and change runtime to pnpm

Dockerfile

@@ -2,23 +2,25 @@ FROM node:23.5.0-alpine
 
 ENV PORT 3000
 
+# Install pnpm globally
+RUN npm install -g pnpm
+
 # Create app directory
 RUN mkdir -p /usr/src/app
 WORKDIR /usr/src/app
 
 # Installing dependencies
-COPY package*.json /usr/src/app/
+COPY package*.json pnpm-lock.yaml* /usr/src/app/
 
-# RUN npm install --force
-RUN npm install -g npm@11.0.0
-RUN npm install next --legacy-peer-deps
+# Install dependencies using pnpm
+RUN pnpm install --frozen-lockfile
 
 # Copying source files
 COPY . /usr/src/app
 
 # Building app
-RUN npm run build
+RUN pnpm run build
 EXPOSE 3000
 
 # Running the app
-CMD "npm" "run" "start"
+CMD ["pnpm", "run", "start"]