4.0.0 (#42)

* adding URL conversions

* updating gotenberg version in documentation

* pkg: input as variadic string (#39)

* pkg: input as variadic string

* pkg: fix link to github doc

* update doc about v4 client

* make doc

* fixing missing variadic inputs in doc

* adding more fonts

* updating PHP documentation

build/docs/content/08-scalability.md

@@ -0,0 +1,27 @@
+---
+title: Scalability
+---
+
+The API being stateless, you may scale it as much as you want.
+
+For instance, using the following Docker Compose file:
+
+```yaml
+version: '3'
+
+services:
+
+  # your others services
+
+  gotenberg:
+    image: thecodingmachine/gotenberg:4
+```
+
+You may now launch your services using:
+
+```bash
+$ docker-compose up --scale gotenberg=your_number_of_instances
+```
+
+When requesting the Gotenberg service with your client(s), Docker will automatically
+redirect a request to a Gotenberg container according to the round-robin strategy.