Adding a dockerfile to application

application/Dockerfile

@@ -0,0 +1,13 @@
+FROM golang:1.21
+
+WORKDIR /usr/src/app
+
+COPY go.mod go.sum ./
+RUN go mod download && go mod verify
+COPY main.go main.go
+RUN go build -v -o /usr/local/bin/app ./main.go
+
+ENV PORT_LISTENING=8080
+ENV JSON_LOCATION=https://git.altarik.fr/Altarik/launcher_json/raw/branch/master/launcher.json
+EXPOSE 8080
+CMD ["app"]

application/main.go

@@ -14,7 +14,7 @@ import (
 func main() {
 	err := godotenv.Load()
 	if err != nil {
-		log.Fatal("Error loading .env file")
+		log.Println("Error loading .env file -- ignore if production")
 	}
 	r := gin.Default()
 	r.GET("/", getLauncherJson)