Remove completed TODO remark. Optionally support .env files.

go.mod

@@ -9,7 +9,7 @@ require (
 
 require (
 	github.com/gorilla/websocket v1.5.0 // indirect
-	github.com/joho/godotenv v1.5.1 // indirect
+	github.com/joho/godotenv v1.5.1
 	golang.org/x/net v0.8.0 // indirect
 	golang.org/x/sync v0.1.0 // indirect
 )

main.go

@@ -1,4 +1,3 @@
-// TODO: Optimisation: only log dt1, dt2, rt1, rt2, g on change.
 package main
 
 import (
@@ -11,6 +10,7 @@ import (
 	_ "time/tzdata"
 
 	mqtt "github.com/eclipse/paho.mqtt.golang"
+	"github.com/joho/godotenv"
 	_ "github.com/lib/pq"
 )
 
@@ -74,11 +74,10 @@ type Payload struct {
 var db *sql.DB
 
 func main() {
-	// // Load environment variables from .env file if it exists
-	// err := godotenv.Load()
-	// if err != nil {
-	// 	log.Println("Error loading .env file:", err)
-	// }
+	// Load environment variables from .env file if it exists
+	if err := godotenv.Load(); err != nil {
+		log.Println("No .env file found or error loading .env file")
+	}
 
 	// Connect to PostgreSQL
 	pgConnStr := os.Getenv("PG_DB")