build: Update Node.js setup and base image in Dockerfile

- Update Node.js setup version from `18.x` to `20.x`
- Correct package installation command for RHEL, CentOS, CloudLinux, Amazon Linux, or Fedora
- Update base image in Dockerfile from `node:18-slim` to `node:20-slim`
- Update maintainer label in Dockerfile
- Update base image in Dockerfile from `node:18-alpine` to `node:20-alpine`

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:18-slim as builder
+FROM node:20-slim as builder
 
 LABEL maintainer="Kagurazaka Mizuki"
 
@@ -21,7 +21,7 @@ RUN if [ "$USE_CHINA_MIRROR" = 1 ]; then \
   && pnpm build
 
 
-FROM node:18-alpine as app
+FROM node:20-alpine as app
 
 WORKDIR /app
 

README.md

@@ -17,15 +17,15 @@ mv /usr/local/NodeStatus/db.sqlite /usr/local/NodeStatus/db.sqlite.bak
 ```bash
 # Install Node.js
 # Using Ubuntu
-curl -fsSL https://deb.nodesource.com/setup_18.x | sudo -E bash -
+curl -fsSL https://deb.nodesource.com/setup_20.x | sudo -E bash -
 sudo apt-get install -y nodejs
 
 # Using Debian, as root
-curl -fsSL https://deb.nodesource.com/setup_18.x | bash -
+curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
 apt-get install -y nodejs
 
 # RHEL, CentOS, CloudLinux, Amazon Linux or Fedora as root
-curl -fsSL https://rpm.nodesource.com/setup_18.x | bash -
+curl -fsSL https://rpm.nodesource.com/setup_20.x | bash -
 
 
 #Install From NPM