git-describe needs .git

Dockerfile

@@ -8,6 +8,7 @@ WORKDIR /app
 COPY ui/package*.json ./
 RUN npm install
 COPY ui/ ./
+COPY .git .
 RUN npm run build
 
 FROM alpine

ui/vue.config.js

 const {gitDescribe, gitDescribeSync} = require('git-describe');
-process.env.VUE_APP_GIT_HASH = gitDescribeSync().hash
+process.env.VUE_APP_GIT_HASH = gitDescribeSync().hash;
 
 module.exports = {
   devServer: {