Add an OpenRC script

etc/init.d/README.md

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+# OpenRC script
+
+## Usage
+
+Copy this script:
+
+```bash
+cp serial-to-tcp /etc/init.d/
+```
+
+Enable autostart on boot by adding the service:
+
+```bash
+rc-update add serial-to-tcp
+```
+
+Start the script manually and/or check its status:
+
+```bash
+rc-service serial-to-tcp start
+rc-service serial-to-tcp status
+```
+
+By default, logs will be stored in `/var/log/serial-to-tcp.log`:
+
+```bash
+tail -f /var/log/serial-to-tcp.log
+```

etc/init.d/serial-to-tcp

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+#!/sbin/openrc-run
+
+name="serial-to-tcp"
+command="serial-to-tcp"
+command_args="-s /dev/ttyUSB0 -b 115200 -p 2021"
+command_background="true"
+output_log="/var/log/serial-to-tcp.log"
+pidfile="/run/serial-to-tcp.pid"
+
+depend() {
+	need net localmount
+	after firewall
+}