Docker builds are failing

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Description

When I build app using Dockerfile, it does not work correctly.

> docker build -t kuma -f docker/dockerfile .
tar: dist: Cannot stat: No such file or directory
tar: Exiting with failure status due to previous errors
The command '/bin/sh -c cd /app && tar -zcvf $DIST dist' returned a non-zero code: 2

> docker build -t kuma -f docker/debian-base.dockerfile .
No platform??
The command '/bin/sh -c node ./extra/download-cloudflared.js $TARGETPLATFORM &&     dpkg --add-architecture arm &&     apt update &&     apt --yes --no-install-recommends install ./cloudflared.deb &&     rm -rf /var/lib/apt/lists/* &&     rm -f cloudflared.deb &&     apt --yes autoremove' returned a non-zero code: 1

👟 Reproduction steps

> docker build -t kuma -f docker/dockerfile .
> docker build -t kuma -f docker/debian-base.dockerfile .


### 👀 Expected behavior

Docker containers build correctly

### 😓 Actual Behavior

Build fails

### 🐻 Uptime-Kuma Version

master / last commit 27dbc02

### 💻 Operating System and Arch

Linux

### 🌐 Browser

not relevant

### 🐋 Docker Version

20.10

### 🟩 NodeJS Version

from container

### 📝 Relevant log output

```shell
> docker build -t kuma -f docker/dockerfile .
tar: dist: Cannot stat: No such file or directory
tar: Exiting with failure status due to previous errors
The command '/bin/sh -c cd /app && tar -zcvf $DIST dist' returned a non-zero code: 2

> docker build -t kuma -f docker/debian-base.dockerfile .
No platform??
The command '/bin/sh -c node ./extra/download-cloudflared.js $TARGETPLATFORM &&     dpkg --add-architecture arm &&     apt update &&     apt --yes --no-install-recommends install ./cloudflared.deb &&     rm -rf /var/lib/apt/lists/* &&     rm -f cloudflared.deb &&     apt --yes autoremove' returned a non-zero code: 1

[reigio]

I am struggling with the same. @fluential did you figured out how to build locally?

[louislam]

Currently, the dockerfile is designed for me to release to Docker Hub and undocumented.

You probably need to build the dist first. Please check build-docker in package.json https://github.com/louislam/uptime-kuma/blob/master/package.json