diff --git a/social-app.-.md b/social-app.-.md
index 566a20f..9c245e4 100644
--- a/social-app.-.md
+++ b/social-app.-.md
@@ -150,8 +150,8 @@ function at-repos-social-app-write() {
 	f=$dt/lib/strings/url-helpers.ts
 	sed -i 's#`https://go\.syu\.is/redirect\?u=\${encodeURIComponent(url)}`#url#g' $f
 
-	f=$dt/state/geolocation.tsx
-	sed -i 's#https://syu\.is/ipcc#https://bsky\.app/ipcc#g' $f
+	#f=$dt/state/geolocation.tsx
+	#sed -i 's#https://syu\.is/ipcc#https://bsky\.app/ipcc#g' $f
 
 	f=$dt/view/icons/Logotype.tsx
 	o=$d/icons/Logotype.tsx
@@ -164,4 +164,53 @@ function at-repos-social-app-write() {
 	sed -i "s#source={{uri: avatar}}#source={{ uri: hackModifyThumbnailPath(avatar, 1 > 0), }}#g" $f
 	grep -R $did_admin .|cut -d : -f 1|sort -u|xargs sed -i "s/${did_admin}/${did}/g"
 }
+```
+
+## ipcc
+
+自前のサービスにするか、あるいは、dockerで建てるかです。
+
+```js
+// Cloudflare Workerのコード
+export default {
+  async fetch(request) {
+    // IPアドレスから国を取得
+    const country = request.cf?.country || 'JP';
+    
+    return new Response(JSON.stringify({ countryCode: country }), {
+      status: 200,
+      headers: {
+        'Content-Type': 'application/json',
+        'Access-Control-Allow-Origin': '*', // CORSを許可！
+        'Access-Control-Allow-Methods': 'GET',
+      },
+    });
+  },
+};
+```
+
+dokcerの方法は以下。
+
+> ./configs/ipcc/default.conf
+
+```js
+server {
+  location / {
+    add_header Content-Type application/json;
+    add_header Access-Control-Allow-Origin *;
+    return 200 '{"countryCode":"JP"}';
+  }
+}
+```
+
+> compose.yml
+
+```yml
+  ipcc:
+    image: nginx:alpine
+    restart: always
+    volumes:
+      - ./configs/ipcc/default.conf:/etc/nginx/conf.d/default.conf
+    ports:
+      - "8099:80"
 ```
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