add instructions on how to develop locally or on docker

DOCKER_DEVELOPMENT.md

@@ -0,0 +1,17 @@
+# Developing using docker
+
+To develop using docker, make sure you have `docker` installed. Run the following command to start simulations of SRT and RTMP streamings, and a bash session where you can run commands such as you'd in your local machine.
+
+```bash
+make run-docker-dev
+```
+
+Inside the container, you can start the donut server.
+
+```bash
+make run-server-inside-docker
+```
+
+You can access [http://localhost:8080/demo/](http://localhost:8080/demo/), using preferable the Chrome browser. You can connect to the simulated SRT and see donut working in practice.
+
+You can work and change files locally, in your OS, and restart `CTRL+C + make run-server-inside-docker` the donut server in the container. It's fast because it avoids rebuilding all images. It'll offer a faster feedback cycle while developing.

MAC_DEVELOPMENT.md

@@ -0,0 +1,36 @@
+# Running on MacOS
+
+To develop using your mac, make sure you have `ffmpeg@5` installed:
+
+```bash
+brew install ffmpeg@5
+```
+
+You can have multiple versions of ffmpeg installed in your mac. To find where the specific `ffmpeg@5`` was installed, run:
+
+```bash
+sudo find /opt/homebrew -name avcodec.h
+```
+
+Let's assume the prior command showed two entries:
+
+```bash
+sudo find /opt/homebrew -name avcodec.h
+/opt/homebrew/Cellar/ffmpeg/7.0_1/include/libavcodec/avcodec.h
+/opt/homebrew/Cellar/ffmpeg@5/5.1.4_6/include/libavcodec/avcodec.h
+```
+
+You must configure the CGO library path pointing it to the ffmpeg 5 folder.
+
+```bash
+export CGO_LDFLAGS="-L/opt/homebrew/Cellar/ffmpeg@5/5.1.4_6/lib/"
+export CGO_CFLAGS="-I/opt/homebrew/Cellar/ffmpeg@5/5.1.4_6/include/"
+export PKG_CONFIG_PATH="/opt/homebrew/Cellar/ffmpeg@5/5.1.4_6/lib/pkgconfig"
+```
+
+Now, you can run it locally:
+
+```bash
+go run main.go -- --enable-ice-mux=true
+go test -v ./...
+```