docs: working with http-proxy

frontend/docs/toc.ts

@@ -53,6 +53,11 @@ export default [
     id: "why",
     group: "Guide",
   },
+  {
+    title: "Working behind a proxy",
+    id: "working-with-http-proxy",
+    group: "Guide",
+  },
   {
     "title": "FAQ",
     "id": "faq",

frontend/docs/working-with-http-proxy.md

@@ -0,0 +1,42 @@
+---
+description: This guide explains how to use JSR behind an HTTP(s) proxy.
+---
+
+In some case you may need to use JSR behind an HTTP(s) proxy. This guide will
+help you to configure your environment to use JSR behind a proxy.
+
+## With `npm`, `yarn` or `pnpm`
+
+Theses tools understand the `.npmrc` file, which is used to configure the proxy
+settings.
+
+> So we recommand to read the official documentation of npm Available
+> [here](https://docs.npmjs.com/cli/v11/using-npm/config#https-proxy)
+
+Example of `.npmrc` file:
+
+```ini
+proxy=http://proxy.example.com:8080
+```
+
+## With `deno`
+
+It's use `HTTP_PROXY` and `HTTPS_PROXY` environment variables. For more
+infromation we invite you to read the
+[deno docs](https://docs.deno.com/runtime/reference/env_variables/#special-environment-variables)
+
+```sh
+export HTTP_PROXY=http://proxy.example.com:8080
+export HTTPS_PROXY=http://proxy.example.com:8080
+```
+
+and then
+
+```
+deno install jsr:@luca/flag
+```
+
+## With `bun`
+
+Sadly, bun doesn't support proxy settings yet. _Or it's not obvious how to do
+it._