chore: small changes dockerfile

Author: dec0dOS

.dockerignore

@@ -14,4 +14,5 @@ yarn-debug.log*
 yarn-error.log*
 
 .yarn/cache
+db.json
 backend/data/db.json

docker/zero-ui/Dockerfile

@@ -17,9 +17,10 @@ FROM node:lts-alpine
 WORKDIR /app/frontend/build
 COPY --link --from=frontend-build /app/frontend/build /app/frontend/build/
 
-WORKDIR /app/backend
+WORKDIR /app/
 COPY --link package.json yarn.lock* .yarnrc.yml ./
 COPY --link .yarn/ ./.yarn
+WORKDIR /app/backend
 COPY --link ./backend/package.json /app/backend
 RUN yarn workspaces focus --production backend && yarn cache clean