chore: add Dev Container (#313)

.vscode/tasks.json

@@ -0,0 +1,37 @@
+{
+  // See https://go.microsoft.com/fwlink/?LinkId=733558
+  // for the documentation about the tasks.json format
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "label": "Run Caddy",
+      "type": "shell",
+      "command": "caddy run --config reverse-proxy/Caddyfile",
+      "isBackground": true,
+      "problemMatcher": {
+        "owner": "custom",
+        "pattern": [
+          {
+            "regexp": ".",
+            "file": 1,
+            "location": 2,
+            "message": 3
+          }
+        ],
+        "background": {
+          "activeOnStart": true,
+          "beginsPattern": ".*",
+          "endsPattern": "Caddyfile.*"
+        }
+      },
+      "presentation": {
+        "reveal": "always",
+        "panel": "new"
+      },
+      "runOptions": {
+        "runOn": "folderOpen",
+        "instanceLimit": 1
+      }
+    }
+  ]
+}