add compiling info and tutoriel en français to readme

readme.md

@@ -28,7 +28,7 @@ The agent runs on each system you want to monitor. It creates a minimal SSH serv
 
 ## Getting started
 
-If using the binary instead of docker, ignore 4-5 and run the agent using the binary instead.
+If not using docker, ignore 4-5 and run the agent using the binary instead.
 
 1. Start the hub (see [installation](#installation)). The binary command is `beszel serve`.
 2. Open http://localhost:8090 and create an admin user.
@@ -39,6 +39,10 @@ If using the binary instead of docker, ignore 4-5 and run the agent using the bi
 
 If all goes well, you should see the system flip to green. If it goes red, check the Logs page, and see [troubleshooting tips](#faq--troubleshooting).
 
+### Tutoriel en français
+
+Pour le tutoriel en français, consultez https://belginux.com/installer-beszel-avec-docker/
+
 ## Installation
 
 You may choose to install the hub and agent as single binaries, or as docker images.
@@ -257,6 +261,49 @@ Records for longer time periods are made by averaging stats from the shorter tim
 
 If you pause / unpause the agent for longer than one minute, the data will be incomplete and the timing for the current interval will reset.
 
+## Compiling
+
+Both the hub and agent are written in Go, so you can easily build them yourself, or cross-compile for different platforms. Please [install Go](https://go.dev/doc/install) first if you haven't already.
+
+### Agent
+
+```bash
+cd agent
+# prepare / install dependencies
+go mod tidy
+# create a binary in the current directory
+CGO_ENABLED=0 go build -ldflags "-w -s" .
+```
+
+### Hub
+
+The hub embeds the web UI in the binary, so you must build the website first. I use [Bun](https://bun.sh/), but you may use Node.js if you prefer:
+
+```bash
+cd hub/site
+bun install
+bun run build
+```
+
+Then back in the hub directory:
+
+```bash
+go mod tidy
+CGO_ENABLED=0 go build -ldflags "-w -s" .
+```
+
+### Cross-compiling
+
+You can cross-compile for different platforms using the `GOOS` and `GOARCH` environment variables.
+
+For example, to build for Linux ARM64:
+
+```bash
+GOOS=linux GOARCH=arm64 CGO_ENABLED=0 go build -ldflags "-w -s" .
+```
+
+You can see a list of valid options by running `go tool dist list`.
+
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 ## Support