diff --git a/.devcontainer/README.md b/.devcontainer/README.md
index a6069f1c..1ddcb7f8 100644
--- a/.devcontainer/README.md
+++ b/.devcontainer/README.md
@@ -2,4 +2,19 @@
 
 You need to run all dependencies with `deps` command before you start debugging.
 
-Make sure your local IP is correct in `.vscode/launch.json`,
+Create `.env.development` in repository root. Make sure your local IP is correct.
+
+```sh
+NEKO_WEBRTC_NAT1TO1=10.0.0.8
+```
+
+# without container
+
+- Make sure `pulseaudio` contains correct configuration.
+- Specify `DISPLAY` that is being used by xorg.
+
+```sh
+DISPLAY=:0
+NEKO_WEBRTC_NAT1TO1=10.0.0.8
+NEKO_SERVER_BIND=:3000
+```
diff --git a/.gitignore b/.gitignore
index 5e85427e..d13f1364 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 bin/
 .idea
+.env.development
diff --git a/.vscode/launch.json b/.vscode/launch.json
index 1cf4b94e..4973993a 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -7,12 +7,14 @@
         {
             "name": "launch",
             "type": "go",
+            "debugAdapter": "dlv-dap",
             "request": "launch",
             "mode": "debug",
             "program": "${workspaceFolder}/cmd/neko",
             "output": "${workspaceFolder}/bin/debug/neko",
             "cwd": "${workspaceFolder}/",
-            "args": ["serve", "-d", "--webrtc.nat1to1", "192.168.1.80"]
+            "args": ["serve", "-d", "-c", "dev/runtime/config.yml"],
+            "envFile": "${workspaceFolder}/.env.development"
         }
     ]
 }
diff --git a/.vscode/settings.json b/.vscode/settings.json
index f30aa6f0..8645d8f0 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -3,14 +3,7 @@
   "go.inferGopath": false,
   "go.autocompleteUnimportedPackages": true,
   "go.delveConfig": {
-    "useApiV1": false,
-    "dlvLoadConfig": {
-      "followPointers": true,
-      "maxVariableRecurse": 3,
-      "maxStringLen": 400,
-      "maxArrayValues": 400,
-      "maxStructFields": -1
-    }
+    "useApiV1": false
   },
   "[go]": {
     "editor.formatOnSave": true,