added footer and app_version

Dockerfile

@@ -11,8 +11,9 @@ RUN go mod download
 # Copy source code
 COPY . .
 
-# Build statically
-RUN CGO_ENABLED=0 GOOS=linux go build -ldflags='-w -s' -o mdhost .
+# Build statically with version
+ARG APP_VERSION=dev
+RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-w -s -X main.version=${APP_VERSION}" -o mdhost .
 
 # Final scratch image
 FROM scratch