added gameboard

gameboard-service/.devcontainer/devcontainer.json

@@ -0,0 +1,19 @@
+{
+  "name": "board.battlesnake.local",
+  "image": "mcr.microsoft.com/devcontainers/javascript-node:18",
+  "postCreateCommand": "npm install",
+  "forwardPorts": [3005],
+  "customizations": {
+    "vscode": {
+      "extensions": ["svelte.svelte-vscode", "esbenp.prettier-vscode", "dbaeumer.vscode-eslint"],
+      "settings": {
+        "editor.tabSize": 2,
+        "editor.formatOnSave": true,
+        "editor.defaultFormatter": "esbenp.prettier-vscode",
+        "eslint.validate": ["javascript", "svelte", "typescript"],
+        "prettier.requireConfig": true,
+        "svelte.enable-ts-plugin": true
+      }
+    }
+  }
+}