Add docker compose development template

Author: eelkevdbos

docs/integrations/docker.md

@@ -70,3 +70,24 @@ CMD ["./bun", "src/index.ts"]
 
 EXPOSE 3000
 ```
+
+## Development
+
+To develop with Elysia in Docker, you can use the following minimal docker compose template:
+
+```yaml
+# docker-compose.yml
+version: '3.9'
+
+services:
+  app:
+    image: "oven/bun"
+    # override default entrypoint allows us to do `bun install` before serving
+    entrypoint: []
+    # execute bun install before we start the dev server in watch mode
+    command: "/bin/sh -c 'bun install && bun run --watch src/index.ts'"
+    # expose the right ports
+    ports: ["3000:3000"]
+    # setup a host mounted volume to sync changes to the container
+    volumes: ["./:/home/bun/app"]
+```