chore: update readme and Dockerfile with pnpm

Dockerfile

@@ -1,12 +1,15 @@
 FROM node:18-alpine AS base
 
+RUN npm install -g pnpm
+WORKDIR /app
+
 # Install dependencies only when needed
 FROM base AS deps
 # Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.
 RUN apk add --no-cache libc6-compat
-WORKDIR /app
-COPY package.json yarn.lock ./
-RUN yarn install --frozen-lockfile
+
+COPY package.json pnpm-lock.yaml ./
+RUN pnpm install
 
 # Rebuild the source code only when needed
 FROM base AS builder
@@ -20,7 +23,7 @@ COPY . .
 # ENV NEXT_TELEMETRY_DISABLED 1
 
 ENV BUILD_STANDALONE true
-RUN yarn build
+RUN pnpm build
 
 # If using npm comment out above and use below instead
 # RUN npm run build

README.md

@@ -9,9 +9,9 @@ Web client for [`rezervo`](https://github.com/mathiazom/rezervo), including book
 
 #### 🧑‍🔧 Setup
 
-1. Install dependencies using Yarn
+1. Install dependencies using pnpm
    ```shell
-   yarn install
+   pnpm install
    ```
 2. Define your own `.env.local` from [`.env.local.example`](.env.local.example)
 
@@ -23,14 +23,14 @@ Web client for [`rezervo`](https://github.com/mathiazom/rezervo), including book
 
 3. Setup and start the [rezervo](https://github.com/mathiazom/rezervo) backend
 
-#### 🧶 Run with Yarn
+#### 📦 Run with pnpm
 
 ```shell
-yarn dev
+pnpm dev
 
 # or
 
-yarn prod
+pnpm prod
 ```
 
 #### 🐋 Run with Docker
@@ -44,8 +44,8 @@ yarn prod
 #### 🧹 Code style, lint and type checking
 
 ```shell
-yarn check
+pnpm check
 
 # automatic fixes
-yarn fix
+pnpm fix
 ```