docs(installation): add PORT env variable to example commands (#3254) [skip ci]

* docs(installation): add PORT env variable to Docker CLI & Docker Compose examples

* docs(installation): fix typo

* docs(installation): clarify hint about named volumes for windows installation example

docs/getting-started/installation.md

@@ -28,6 +28,7 @@ docker run -d \
   --name overseerr \
   -e LOG_LEVEL=debug \
   -e TZ=Asia/Tokyo \
+  -e PORT=5055 `#optional` \
   -p 5055:5055 \
   -v /path/to/appdata/config:/app/config \
   --restart unless-stopped \
@@ -81,6 +82,7 @@ services:
     environment:
       - LOG_LEVEL=debug
       - TZ=Asia/Tokyo
+      - PORT=5055 #optional
     ports:
       - 5055:5055
     volumes:
@@ -88,7 +90,7 @@ services:
     restart: unless-stopped
 ```
 
-Then, start all services defined in the your Compose file:
+Then, start all services defined in the Compose file:
 
 ```bash
 docker-compose up -d
@@ -146,8 +148,6 @@ Then, create and start the Overseerr container:
 docker run -d --name overseerr -e LOG_LEVEL=debug -e TZ=Asia/Tokyo -p 5055:5055 -v "overseerr-data:/app/config" --restart unless-stopped sctx/overseerr:latest
 ```
 
-If using a named volume like above, you can safely ignore the warning about the `/app/config` folder being incorrectly mounted on the setup page.
-
 To access the files inside the volume created above, navigate to `\\wsl$\docker-desktop-data\version-pack-data\community\docker\volumes\overseerr-data\_data` using File Explorer.
 
 {% hint style="info" %}
@@ -155,7 +155,7 @@ Docker on Windows works differently than it does on Linux; it runs Docker inside
 
 **If you must run Docker on Windows, you should put the `/app/config` directory mount inside the VM and not on the Windows host.** (This also applies to other containers with SQLite databases.)
 
-Named volumes, like in the example commands above, are automatically mounted inside the VM.
+Named volumes, like in the example commands above, are automatically mounted inside the VM. Therefore the warning on the setup about the `/app/config` folder being incorrectly mounted page should be ignored.
 {% endhint %}
 
 ## Linux