Update

Dockerfile

@@ -1,20 +1,19 @@
-FROM node:12.14.0-alpine AS build
+FROM node:18-alpine AS build
 ENV NODE_ENV=development
 WORKDIR /app
 
 RUN apk -U upgrade && apk add \
   git \
-  yarn \
+  pnpm \
   && rm -rf /var/cache/apk/*
 
-COPY package.json yarn.lock /app/
+COPY package.json pnpm-lock.yaml /app/
 
-RUN yarn --pure-lockfile \
-  && yarn cache clean
+RUN pnpm install --frozen-lockfile
 COPY . /app/
-RUN yarn run build
+RUN pnpm run build
 
-FROM node:12.14.0-alpine AS production
+FROM node:18-alpine AS production
 LABEL maintainer="f0reachARR" description="KIT Notification Bot for Discord"
 ENV NODE_ENV=production
 ENV TZ=Asia/Tokyo