optimize dockerfile and config generate of docker deploy

deploy/dockerfile/modelrt.Dockerfile

@@ -9,7 +9,11 @@ RUN CGO_ENABLED=0 go build -ldflags="-s -w" -o modelrt main.go
 
 FROM alpine:latest
 WORKDIR /app
+ARG USER_ID=1000
+RUN adduser -D -u ${USER_ID} modelrt
 COPY --from=builder /app/modelrt ./modelrt
 COPY configs/config.example.yaml ./configs/config.example.yaml
+RUN chown -R modelrt:modelrt /app
 RUN chmod +x /app/modelrt
-CMD ["/app/modelrt"]
+USER modelrt
+CMD ["/app/modelrt", "-modelRT_config_dir=/app/configs"]

main.go

@@ -72,14 +72,16 @@ func main() {
 		log.Println("configuration file not found,checking for example file")
 
 		exampleConfigPath := filepath.Join(*modelRTConfigDir, *modelRTConfigName+".example."+*modelRTConfigType)
+		configDir := filepath.Dir(configPath)
+		if err := os.MkdirAll(configDir, 0o755); err != nil {
+			panic(fmt.Errorf("failed to create config directory %s:%w", configDir, err))
+		}
 		if _, err := os.Stat(exampleConfigPath); err == nil {
 			if err := util.CopyFile(exampleConfigPath, configPath); err != nil {
-				panicErr := fmt.Errorf("failed to copy example config file:%w", err)
-				panic(panicErr)
+				panic(fmt.Errorf("failed to copy example config file:%w", err))
 			}
 		} else {
-			panicErr := errors.New("no config file and no config example file found")
-			panic(panicErr)
+			panic(errors.New("no config file and no config example file found"))
 		}
 	}