Fix environment variables definition

README.md

@@ -9,9 +9,9 @@ A Docker container to wake up a computer on a schedule.
 ```bash
 docker run \
   axeleroy/wakeonlan-cron-docker:latest \
-  -e TZ='Europe/Paris' \
-  -e CRON='20 4 * * *' \
-  -e MAC_ADDRESS=AA:BB:CC:DD:EE:FF \
+  -e "TZ=Europe/Paris" \
+  -e "CRON=20 4 * * *" \
+  -e "MAC_ADDRESS=AA:BB:CC:DD:EE:FF" \
   --network="host"
 ```
 
@@ -22,8 +22,8 @@ services:
   wake-on-lan:
     image: axeleroy/wakeonlan-cron-docker:latest
     environment:
-      - TZ='Europe/Paris'
-      - CRON='20 4 * * *'
+      - TZ=Europe/Paris
+      - CRON=20 4 * * *
       - MAC_ADDRESS=AA:BB:CC:DD:EE:FF
     network_mode: host
 ```
@@ -32,7 +32,7 @@ services:
 
 | Variable       | Meaning                                                                   | Example                         |
 |----------------|---------------------------------------------------------------------------|---------------------------------|
-| `TZ`           | Timezone                                                                  | `TZ='Europe/Paris'`             |
-| `CRON`         | Cron schedule expression (tip: use [crontab.guru](https://crontab.guru/)) | `CRON='20 4 * * *'`             |
+| `TZ`           | Timezone                                                                  | `TZ=Europe/Paris`               |
+| `CRON`         | Cron schedule expression (tip: use [crontab.guru](https://crontab.guru/)) | `CRON=20 4 * * *`               |
 | `MAC_ADDRESS`  | Mac address of the computer you want to wake up                           | `MAC_ADDRESS=AA:BB:CC:DD:EE:FF` | 
 | `BROADCAST_IP` | IP address of the subnet to broadcast the magic packet to                 | `BROADCAST_IP=192.168.0.255`    |