Update Dockerfile

Dockerfile

@@ -23,7 +23,7 @@ COPY src/manage /usr/share/nginx/html/manage
 RUN apk add util-linux
 RUN cp /usr/share/nginx/html/manage/v1/api.template /usr/share/nginx/html/manage/v1/api
 RUN sed -i "s/{RELEASE_DATE}/$(date +%F)/g" /usr/share/nginx/html/manage/v1/api 
-RUN sed  -i "s/{API_VERSION}/2.0/g" /usr/share/nginx/html/manage/v1/api
+RUN sed  -i "s/{APP_VERSION}/2.0/g" /usr/share/nginx/html/manage/v1/api
 RUN sed  -i "s/{UUID}/$(uuidgen)/g" /usr/share/nginx/html/manage/v1/api
 RUN rm /usr/share/nginx/html/manage/v1/api.template