add devcontainer setting

Author: tttamaki

.devcontainer/devcontainer.json

@@ -0,0 +1,39 @@
+// see https://code.visualstudio.com/docs/remote/devcontainerjson-reference for detail
+{
+    "name": "docker example",
+    "dockerComposeFile": "./docker-compose.yml",
+    "service": "mypython",
+    "workspaceFolder": "/mnt",
+    "shutdownAction": "stopCompose", // container stops when connection lost
+    // "shutdownAction": "none", // container does not stop
+    "settings": {
+        "python.pythonPath": "/usr/local/bin/python",
+        "python.linting.flake8Enabled": true,
+        "python.linting.enabled": true,
+        "python.linting.pylintEnabled": false,
+        "editor.formatOnSave": true,
+        "editor.rulers": [
+            80
+        ],
+        "editor.formatOnSave": true,
+        "editor.highlightActiveIndentGuide": true,
+        "workbench.tree.renderIndentGuides": "always",
+    },
+    "extensions": [
+        "brainfit.vscode-coverage-highlighter",
+        "davidanson.vscode-markdownlint",
+        "jbenden.c-cpp-flylint",
+        "lextudio.restructuredtext",
+        "mhutchie.git-graph",
+        "ms-ceintl.vscode-language-pack-ja",
+        "ms-python.python",
+        "ms-toolsai.jupyter",
+        "ms-vscode.cmake-tools",
+        "shd101wyy.markdown-preview-enhanced",
+        "tht13.html-preview-vscode",
+        "visualstudioexptteam.vscodeintellicode",
+        "yzhang.markdown-all-in-one",
+        "njpwerner.autodocstring",
+        "himanoa.python-autopep8",
+    ],
+}

.devcontainer/docker-compose.yml

@@ -0,0 +1,8 @@
+version: "3"
+
+services:
+  mypython:
+    build: ../
+    volumes:
+      - ../:/mnt
+    tty: true