add README

Dockerfile

+# ใช้ base image เป็น Ubuntu
+FROM ubuntu:20.04
+
+# ตั้งค่า environment variables เพื่อไม่ให้ Docker รอการป้อนข้อมูลจากผู้ใช้
+ENV DEBIAN_FRONTEND=noninteractive
+
+# อัพเดต package list และติดตั้ง dependencies
+RUN apt-get update && apt-get install -y \
+    curl \
+    gnupg2 \
+    lsb-release \
+    && rm -rf /var/lib/apt/lists/*
+
+# เพิ่ม repository ของ SaltStack
+RUN curl -fsSL https://repo.saltproject.io/py3/ubuntu/20.04/amd64/latest/SALTSTACK-GPG-KEY.pub | apt-key add -
+RUN echo "deb http://repo.saltproject.io/py3/ubuntu/20.04/amd64/latest focal main" > /etc/apt/sources.list.d/saltstack.list
+
+# อัพเดต package list และติดตั้ง Salt Master และ Salt API
+RUN apt-get update && apt-get install -y \
+    salt-master \
+    salt-api \
+    && rm -rf /var/lib/apt/lists/*
+RUN useradd -m -s /bin/bash saltuser && echo "saltuser:saltpassword" | chpasswd
+# เปิดพอร์ตที่ใช้โดย Salt Master และ Salt API
+EXPOSE 4505 4506 8000
+
+# คัดลอกไฟล์การตั้งค่า (ถ้ามี) ไปยังตำแหน่งที่ถูกต้อง
+COPY ./master /etc/salt/master
+COPY ./salt-api.service /etc/systemd/system
+COPY ./salt-master.service /etc/systemd/system
+
+# เริ่มต้น Salt Master และ Salt API เมื่อ container รัน
+CMD ["sh", "-c", "salt-master -d && salt-api -d && tail -f /var/log/salt/master"]

docker-compose.yml

+version: '3.8'
+
+services:
+ 
+
+  salt-master:
+    build: .  
+    container_name: salt-master
+    ports:
+      - "4505:4505"  
+      - "4506:4506"  
+      - "8000:8000"  
+    environment:
+      - SALT_USER=saltuser 
+      - SALT_PASSWORD=saltpassword 
+    volumes:
+      - ./salt-master:/etc/salt/master.d 
+
+  pg_grafana:
+    image: harbor.nexpie.com/flowstack/postgresql:1.0.1-0-3af5ae67
+    restart: always  
+    environment:
+      - POSTGRES_DB =${POSTGRES_DB:-postgres}
+      - POSTGRES_USER=${POSTGRES_USER:-user}  # Set environment variable POSTGRES_USER with default value 'user'
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-password}  # Set environment variable POSTGRES_PASSWORD with default value 'password' (not recommended for security reasons)
+    volumes:
+      - postgres:/data/postgres  # Mount named volume 'postgres' to /data/postgres in container
+#    ports:
+ #     - "5432:5432"  # Map host port 5432 to container port 5432
+    networks:
+      - postgres  # Connect container to the 'postgres' network
+
+  grafana:
+    restart: always  # Restart container automatically on failure
+    depends_on:
+      - pg_grafana  # Wait for pg_grafana service to be up before starting
+    image: harbor.nexpie.com/flowstack/grafana:10.3.1-1  # Use specific Grafana image
+#    image: grafana/grafana-enterprise
+    environment:
+      - GF_FLOWSTACK_POSTGRES_ENDPOINT=${POSTGRES_ENDPOINT:-pg_grafana}:${POSTGRES_PORT:-5432}  # Set Grafana database host (pg_grafana service name)
+      - GF_FLOWSTACK_POSTGRES_DATABASE=${POSTGRES_DB:-postgres}  # Set Grafana database name (environment variable not defined)
+      - GF_FLOWSTACK_POSTGRES_USER=${POSTGRES_USER:-user}  # Incorrect variable reference, use ${POSTGRES_USER}
+      - GF_FLOWSTACK_POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-password}  # Incorrect variable reference, use ${POSTGRES_PASSWORD}
+#      - GF_DATABASE_SSL_MODE=disable  # Disable SSL mode for database connection
+    ports:
+      - "43000:3000"  # Map host port 43000 to container port 3000 (default Grafana port)
+
+  pgadmin:
+    container_name: pgadmin_container
+    image: dpage/pgadmin4
+    environment:
+      - PGADMIN_DEFAULT_EMAIL=${PGADMIN_DEFAULT_EMAIL:-pgadmin4@pgadmin.org}  # Set default email for pgAdmin with fallback
+      - PGADMIN_DEFAULT_PASSWORD=${PGADMIN_DEFAULT_PASSWORD:-admin}  # Set default password for pgAdmin with fallback
+      - PGADMIN_CONFIG_SERVER_MODE=False  # Disable server mode for pgAdmin
+    volumes:
+      - pgadmin:/var/lib/pgadmin  # Mount named volume 'pgadmin' to /var/lib/pgadmin in container
+    ports:
+      - "${PGADMIN_PORT:-8888}:80"  # Map host port defined by PGADMIN_PORT (default 8888) to container port 80
+    networks:
+      - postgres  # Connect container to the 'postgres' network
+    restart: unless-stopped  # Restart container only if it exits abnormally
+
+networks:
+  postgres:
+    driver: bridge  # Create a bridge network for communication
+
+volumes:
+  postgres:  # Empty volume definition for pg_grafana
+  pgadmin:  # Empty volume definition for pgadmin

salt-api.service

+[Unit]
+Description=Salt API
+After=network.target
+Requires=salt-master.service
+
+[Service]
+Type=simple
+User=root
+ExecStart=/usr/bin/salt-api
+ExecReload=/bin/kill -HUP $MAINPID
+Restart=on-failure
+
+[Install]
+WantedBy=multi-user.target

salt-master.service

+[Unit]
+Description=The Salt Master Server
+After=network.target
+
+[Service]
+Type=simple
+User=root
+ExecStart=/usr/bin/salt-master
+
+[Install]
+WantedBy=multi-user.target