feat: add VS Code extensions to devcontainer configuration

.devcontainer/devcontainer.json

@@ -50,10 +50,30 @@
   // "forwardPorts": [],
 
   // Use 'postCreateCommand' to run commands after the container is created.
-  "postCreateCommand": "bash .devcontainer/start.sh"
+  "postCreateCommand": "bash .devcontainer/start.sh",
 
   // Configure tool-specific properties.
-  // "customizations": {},
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "mikestead.dotenv",
+        "usernamehw.errorlens",
+        "streetsidesoftware.code-spell-checker",
+        "mhutchie.git-graph",
+        "yzhang.markdown-all-in-one",
+        "christian-kohler.npm-intellisense",
+        "42Crunch.vscode-openapi",
+        "christian-kohler.path-intellisense",
+        "esbenp.prettier-vscode",
+        "rust-lang.rust-analyzer",
+        "nefrob.vscode-just-syntax",
+        "redhat.vscode-yaml",
+        // optional
+        "SirTori.indenticator",
+        "oderwat.indent-rainbow"
+      ]
+    }
+  }
 
   // Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
   // "remoteUser": "root"