Create the necessary Docker assets to containerize app

.dockerignore

@@ -0,0 +1,34 @@
+# Include any files or directories that you don't want to be copied to your
+# container here (e.g., local build artifacts, temporary files, etc.).
+#
+# For more help, visit the .dockerignore file reference guide at
+# https://docs.docker.com/go/build-context-dockerignore/
+
+**/.DS_Store
+**/__pycache__
+**/.venv
+**/.classpath
+**/.dockerignore
+**/.env
+**/.git
+**/.gitignore
+**/.project
+**/.settings
+**/.toolstarget
+**/.vs
+**/.vscode
+**/*.*proj.user
+**/*.dbmdl
+**/*.jfm
+**/bin
+**/charts
+**/docker-compose*
+**/compose.y*ml
+**/Dockerfile*
+**/node_modules
+**/npm-debug.log
+**/obj
+**/secrets.dev.yaml
+**/values.dev.yaml
+LICENSE
+README.md

Dockerfile

@@ -0,0 +1,35 @@
+ARG PYTHON_VERSION=3.11.4
+FROM python:${PYTHON_VERSION}-slim AS base
+
+# Prevents Python from writing pyc files.
+ENV PYTHONDONTWRITEBYTECODE=1
+
+# Keeps Python from buffering stdout and stderr to avoid situations where
+# the application crashes without emitting any logs due to buffering.
+ENV PYTHONUNBUFFERED=1
+
+WORKDIR /app
+
+# Create a non-privileged user that the app will run under.
+# See https://docs.docker.com/go/dockerfile-user-best-practices/
+ARG UID=10001
+RUN adduser \
+    --disabled-password \
+    --gecos "" \
+    --home "/nonexistent" \
+    --shell "/sbin/nologin" \
+    --no-create-home \
+    --uid "${UID}" \
+    appuser
+
+# Switch to the non-privileged user to run the application.
+USER appuser
+
+# Copy the source code into the container.
+COPY . .
+
+# Expose the port that the application listens on.
+EXPOSE 5020
+
+# Run the application.
+CMD python3 server.py --host 0.0.0.0 --port 5020

README.md

@@ -12,6 +12,28 @@ Make sure the Python is version 3.7 or newer.
 
 The default listening port is **5020**.
 
+## Execute in container
+
+Make sure that You have installed the latest version of [Docker Desktop](https://docs.docker.com/get-started/get-docker/).
+
+Run the following command in a terminal.
+
+```sh
+docker compose up --build
+```
+
+You can run the application detached from the terminal by adding the -d option.
+
+```sh
+docker compose up --build -d
+```
+
+Run the following command to stop the application.
+
+```sh
+docker compose down
+```
+
 ## Impelemented Functions
 
 1. Read Coils

compose.yaml

@@ -0,0 +1,6 @@
+services:
+  server:
+    build:
+      context: .
+    ports:
+      - 5020:5020

server.py

@@ -3,6 +3,7 @@
 from time import time
 import asyncio, socket
 import ssl
+import argparse
 
 from modbus_exception import modbus_exception
 from modbus_functions import func_dict
@@ -246,7 +247,11 @@ def run(self):
 
 
 if __name__ == '__main__':
-    server = modbus_server()
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--host", help="Specifies the TCP/IP address on which the server is to listen for connections from clients. The default value is 127.0.0.1", default="127.0.0.1")
+    parser.add_argument("--port", type=int, help="The TCP port the server listens on; 5020 by default.", default=5020)
+    args = parser.parse_args()
+    server = modbus_server(args.host, args.port)
     print("MODBUS server listens on {}:{}".format(server.host, server.port))
     server.run()
     print("MODBUS server closed")