Update README.md

Author: tanhongit

README.md

@@ -12,6 +12,29 @@ In this docker repository, we have built the following images:
 
 - [cslant/dev-php83](https://hub.docker.com/r/cslant/dev-php83)
 - [cslant/dev-worker83](https://hub.docker.com/r/cslant/dev-worker83)
+- [cslant/dev-mysql](https://hub.docker.com/r/cslant/dev-mysql)
 - [cslant/dev-node22](https://hub.docker.com/r/cslant/dev-node22)
 - [cslant/dev-nginx](https://hub.docker.com/r/cslant/dev-nginx)
 - [cslant/dev-postgres](https://hub.docker.com/r/cslant/dev-postgres)
+
+## Prerequisites
+
+First, copy the `.env.example` file to `.env` and update the values.
+
+```bash
+envsubst < .env.example > .env
+```
+
+If you don't have `envsubst` command, you can use the following command:
+
+```bash
+cp .env.example .env
+```
+
+### 💻 Start in Mac with arm64
+
+To run as amd64. You need to set the default platform to `linux/amd64`:
+
+```shell
+export DOCKER_DEFAULT_PLATFORM=linux/amd64
+```