diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
deleted file mode 100644
index a5e2a49..0000000
--- a/.devcontainer/devcontainer.json
+++ /dev/null
@@ -1,34 +0,0 @@
-{
-    "image": "mcr.microsoft.com/devcontainers/universal:2",
-    "hostRequirements": {
-      "cpus": 4
-    },
-    "waitFor": "onCreateCommand",
-    "updateContentCommand": "npm install",
-    "postCreateCommand": "",
-    "postAttachCommand": {
-      "server": "npm start"
-    },
-    "forwardPorts": [
-        3000
-    ],
-    "customizations": {
-        "vscode": {
-            "extensions": [
-                "GitHub.copilot",
-                "dbaeumer.vscode-eslint",
-                "github.vscode-github-actions",
-                "GitHub.vscode-pull-request-github",
-                "VisualStudioExptTeam.vscodeintellicode",
-                "VisualStudioExptTeam.intellicode-api-usage-examples",
-                "esbenp.prettier-vscode",
-                "naumovs.color-highlight",
-                "GitHub.github-vscode-theme",
-                "GitHub.remotehub",
-                "GitHub.codespaces",
-                "PKief.material-icon-theme",
-                "tomoki1207.pdf"
-            ]
-        }
-    }
-  }
\ No newline at end of file
diff --git a/.devcontainer/icon.svg b/.devcontainer/icon.svg
deleted file mode 100644
index e07b101..0000000
--- a/.devcontainer/icon.svg
+++ /dev/null
@@ -1,9 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="-11.5 -10.23174 23 20.46348">
-  <title>React Logo</title>
-  <circle cx="0" cy="0" r="2.05" fill="#61dafb"/>
-  <g stroke="#61dafb" stroke-width="1" fill="none">
-    <ellipse rx="11" ry="4.2"/>
-    <ellipse rx="11" ry="4.2" transform="rotate(60)"/>
-    <ellipse rx="11" ry="4.2" transform="rotate(120)"/>
-  </g>
-</svg>
\ No newline at end of file