diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 8920355..9fde2d4 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -1,3 +1,5 @@
 {
-        "workspaceFolder": "/mnt"
+    "dockerComposeFile": "../docker-compose.yml",
+    "service": "mypython",
+    "workspaceFolder": "/mnt"
 }
diff --git a/.vscode/extensions.json b/.vscode/extensions.json
new file mode 100644
index 0000000..3a3b112
--- /dev/null
+++ b/.vscode/extensions.json
@@ -0,0 +1,15 @@
+{
+    "recommendations": [
+        "mhutchie.git-graph",
+        "ms-ceintl.vscode-language-pack-ja",
+        "ms-python.black-formatter",
+        "ms-python.autopep8",
+        "ms-python.flake8",
+        "ms-python.pylint",
+        "ms-python.python",
+        "ms-python.vscode-pylance",
+        "njpwerner.autodocstring",
+        "visualstudioexptteam.vscodeintellicode-completions",
+        "visualstudioexptteam.vscodeintellicode",
+    ]
+}
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..8001e81
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,26 @@
+{
+    "editor.rulers": [
+        80,
+    ],
+    "editor.renderWhitespace": "boundary",
+    "editor.tabSize": 4,
+    "editor.formatOnSave": true,
+    "editor.formatOnPaste": true,
+    "editor.formatOnType": true,
+    //
+    "files.autoSave": "onFocusChange",
+    "files.insertFinalNewline": true,
+    "files.trimFinalNewlines": true,
+    "files.trimTrailingWhitespace": true,
+    //
+    "python.defaultInterpreterPath": "/usr/local/bin/python",
+    "[python]": {
+        // "editor.defaultFormatter": "ms-python.black-formatter",
+        // "editor.defaultFoldingRangeProvider": "ms-python.python",
+        "editor.defaultFormatter": "ms-python.autopep8",
+        "editor.formatOnType": true,
+        "editor.codeActionsOnSave": {
+            "source.organizeImports": "never"
+        }
+    },
+}
diff --git a/README.md b/README.md
index 7090df0..ec8a990 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ docker compose build
 docker compose up -d
 ```
 
-and access to http://localhost:8888
+and access to <http://localhost:8888>
 
 To stop the container,
 
diff --git a/docker-compose.yml b/docker-compose.yml
index 1b5f43c..952eb24 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,5 +1,3 @@
-version: "3"
-
 services:
   mypython:
     build: ./
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..e4fcf12
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,17 @@
+[tool.autopep8]
+# https://github.com/hhatto/autopep8#configuration
+# https://pycodestyle.pycqa.org/en/latest/intro.html#error-codes
+max_line_length = 120
+ignore = "E5,E4"
+# E4 Import
+# E5 Line length
+aggressive = 2
+
+[tool.black]
+# https://black.readthedocs.io/en/stable/usage_and_configuration/the_basics.html#configuration-format
+line-length = 120
+
+[tool.yapf]
+# https://github.com/google/yapf#excluding-files-from-formatting-yapfignore-or-pyproject-toml
+based_on_style = "pep8"
+column_limit = 120
diff --git a/setup.cfg b/setup.cfg
new file mode 100644
index 0000000..00b7c4f
--- /dev/null
+++ b/setup.cfg
@@ -0,0 +1,40 @@
+[pycodestyle]
+; https://pycodestyle.pycqa.org/en/latest/intro.html#configuration
+max-line-length = 120
+
+[pydocstyle]
+; https://www.pydocstyle.org/en/stable/error_codes.html
+; D100 -- D107 missing docstring
+ignore =
+    D100,
+    D101,
+    D102,
+    D103,
+    D104,
+    D105,
+    D106,
+    D107,
+
+[pylint.]
+; https://pylint.readthedocs.io/en/latest/user_guide/usage/run.html
+; https://github.com/pylint-dev/pylint/blob/main/pylintrc
+disable =
+    missing-module-docstring,
+    missing-class-docstring,
+    missing-function-docstring,
+max-line-length = 120
+
+[flake8]
+; https://flake8.pycqa.org/en/6.0.0/user/configuration.html
+; flake8 follows https://www.pydocstyle.org/en/stable/error_codes.html
+; D100 -- D107 missing docstring
+ignore =
+    D100,
+    D101,
+    D102,
+    D103,
+    D104,
+    D105,
+    D106,
+    D107,
+max-line-length = 120