replace bun with pnpm and added dockerfile for web

apps/web/Dockerfile

@@ -0,0 +1,47 @@
+FROM node:20-slim AS base
+
+ARG DATABASE_URL
+ENV DATABASE_URL=$DATABASE_URL
+
+ARG NEXTAUTH_SECRET
+ENV NEXTAUTH_SECRET=$NEXTAUTH_SECRET
+
+ARG NEXTAUTH_URL
+ENV NEXTAUTH_URL=$NEXTAUTH_URL
+
+ENV PNPM_HOME="/pnpm"
+
+ENV PATH="$PNPM_HOME:$PATH"
+
+RUN corepack enable
+
+ARG NODE_VERSION=18
+
+RUN apt update \
+    && apt install -y curl \
+    && curl -L https://raw.githubusercontent.com/tj/n/master/bin/n -o n \
+    && bash n $NODE_VERSION \
+    && rm n \
+    && npm install -g n
+
+FROM base AS build
+COPY . /app
+WORKDIR /app/apps/web
+RUN --mount=type=cache,id=pnpm,target=/pnpm/store pnpm install --frozen-lockfile --ignore-scripts
+RUN pnpm dlx prisma generate
+RUN pnpm run build
+
+FROM base AS prod
+COPY . /app
+WORKDIR /app
+RUN --mount=type=cache,id=pnpm,target=/pnpm/store pnpm install --frozen-lockfile --prod --ignore-scripts
+
+FROM base AS runner
+COPY --from=build /app/package.json /app/package.json
+COPY --from=prod /app/node_modules /app/node_modules
+COPY --from=build /app/apps/web /app/apps/web
+COPY --from=prod /app/apps/web/node_modules /app/apps/web/node_modules
+WORKDIR /app/apps/web
+RUN pnpm dlx prisma generate
+EXPOSE 3000
+CMD [ "pnpm", "start" ]