add option to change internal port

README.md

@@ -94,6 +94,7 @@ Access the generated M3U playlist at `http://<server ip>:8080/playlist.m3u`.
 
 | ENV VAR                     | Description                                              | Default Value | Possible Values                                |
 |-----------------------------|----------------------------------------------------------|---------------|------------------------------------------------|
+| PORT | Set listening port of service inside the container.                  |   8080 |   Any valid port |
 | PUID | Set UID of user running the container.                  |   1000 |   Any valid UID |
 | PGID | Set GID of user running the container.                  |   1000 |   Any valid GID |
 | TZ                          | Set timezone                                           | Etc/UTC     | [TZ Identifiers](https://nodatime.org/TimeZones) |

main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"fmt"
 	"m3u-stream-merger/database"
 	"m3u-stream-merger/m3u"
 	"m3u-stream-merger/proxy"
@@ -54,10 +55,10 @@ func main() {
 	})
 
 	// Start the server
-	utils.SafeLogln("Server is running on port 8080...")
+	utils.SafeLogln(fmt.Sprintf("Server is running on port %s...", os.Getenv("PORT")))
 	utils.SafeLogln("Playlist Endpoint is running (`/playlist.m3u`)")
 	utils.SafeLogln("Stream Endpoint is running (`/proxy/{originalBasePath}/{streamID}.{fileExt}`)")
-	err = http.ListenAndServe(":8080", nil)
+	err = http.ListenAndServe(fmt.Sprintf(":%s", os.Getenv("PORT")), nil)
 	if err != nil {
 		utils.SafeLogFatalf("HTTP server error: %v", err)
 	}