build: update go version image in dockerfile.

Dockerfile

@@ -1,5 +1,5 @@
-# Use Go 1.21 Alpine as the base image for building the application
-FROM golang:1.21-alpine AS builder
+# Use Go 1.22 Alpine as the base image for building the application
+FROM golang:1.22-alpine AS builder
 
 # Define the base directory for the application as an environment variable
 ENV SERVER_DIR=/openim-server
@@ -22,7 +22,7 @@ RUN go install github.com/magefile/mage@v1.15.0
 RUN mage build
 
 # Using Alpine Linux with Go environment for the final image
-FROM golang:1.21-alpine
+FROM golang:1.22-alpine
 
 # Install necessary packages, such as bash
 RUN apk add --no-cache bash