Hi guys, sorry for my English, I'm using a translator.
I installed on my Synology nas in docker container - code-server (i hav my domain name and static ip).

this is my compose.yaml for install in docker

#services:
code-server:
image: lscr.io/linuxserver/code-server:latest
container_name: codeserver
#environment:
- PUID=#
- PGID=#
- TZ=#
- PASSWORD=#
- SUDO_PASSWORD=#
volumes:
- /volume1/docker/codeserver:/config
ports:
- 8443:8443
restart: unless-stopped

code-server work both on the local network and from outside using my domain name, there are no problems with that (Let's Encrypt certificate available)
Then I installed it in the environment code-server: nodejs+npm+vue cli.
Then with the command in code-server terminal - vue create app I installed Vue2

Vue CLI v5.0.8
? Please pick a preset:
Default ([Vue 3] babel, eslint)
❯ Default ([Vue 2] babel, eslint)
Manually select features

but when I try to run the project with the command (sudo npm run serve, by url (https://myDomain/proxy/8080/)) I see an error in the browser - Invalid Host header.

I changed the file vue.config.js:

module.exports = {
publicPath: "./",
productionSourceMap: false,
devServer: {
allowedHosts: ['myDomain'], -- MY ADD
headers: {
'Access-Control-Allow-Origin': '*',
}
},
transpileDependencies: true
}

I saw the project in the browser, but with an error(

Unexpected token 'o', "[object Blob]" is not valid JSON
SyntaxError: Unexpected token 'o', "[object Blob]" is not valid JSON
at JSON.parse ()
at eval (webpack-internal:///./node_modules/webpack-dev-server/client/socket.js:67:24)
at client.onmessage (webpack-internal:///./node_modules/webpack-dev-server/client/clients/WebSocketClient.js:81:9)
)

Then I changed the file vue.config.js on:
module.exports = {
publicPath: "./",
productionSourceMap: false,
devServer: {
allowedHosts: ['MyDomain],
headers: {
'Access-Control-Allow-Origin': '*',
},
client: {
webSocketURL: 'auto://0.0.0.0:8080/ws', --MY ADD
},
},
transpileDependencies: true
}

After this I see the page without errors, but there is an error in the browser console:
WebSocketClient.js:13 WebSocket connection to 'wss://myDomain:8080/ws' failed: Error in connection establishment: net::ERR_SSL_PROTOCOL_ERROR.

WebSocketClient refuses to work and therefore HOT RELOAD also...

p.s: I understand that the conflict is somewhere in the ports, and synology nas has its own nginx.

Thanks for understanding).

please help