Add Docker installation and update CMD command

Dockerfile

@@ -5,7 +5,19 @@ ENV PORT_IP_MAP ""
 ENV PYTHONUNBUFFERED=1
 
 # Install Python and pip
-RUN apt-get update && apt-get install -y python3 python3-pip python3-venv
+RUN apt-get update && apt-get install -y python3 python3-pip python3-venv 
+
+# Install Docker
+RUN apt-get update && apt-get install -y \
+  apt-transport-https \
+  ca-certificates \
+  curl \
+  gnupg \
+  lsb-release && \
+  curl -fsSL https://download.docker.com/linux/debian/gpg | apt-key add - && \
+  echo "deb [arch=amd64] https://download.docker.com/linux/debian $(lsb_release -cs) stable" > /etc/apt/sources.list.d/docker.list && \
+  apt-get update && \
+  apt-get install -y docker-ce docker-ce-cli containerd.io
 
 # Create a virtual environment and activate it
 RUN python3 -m venv /app/venv
@@ -25,4 +37,4 @@ RUN pip install -r requirements.txt
 EXPOSE 80
 
 # Start Nginx and run the Python app
-CMD service nginx start && exec python app.py
+CMD docker compose up -d --remove-orphans && service nginx start && exec python app.py

app/docker-compose.yml

@@ -0,0 +1,16 @@
+version: "3.9"
+
+services:
+  mc_placeholder_starting:
+    container_name: mc_placeholder_starting
+    image: itzg/minecraft-server
+    ports:
+      - "20000:20000"
+    environment:
+      type: "PAPER"
+      EULA: "TRUE"
+      MOTD: "starting..."
+      MAX_PLAYERS: "0"
+      MAX_MEMORY: "200M"
+      SERVER_PORT: "20000"
+      ONLINE_MODE: "FALSE"