This server does not have a license key specified

[spritsail]

This server does not have a license key specified

[frebib]

Running the compose file that you provided above, I can see that FXServer is launched with the following cmdline

/opt/cfx-server/ld-musl-x86_64.so.1 --library-path /usr/lib/v8/:/lib/:/usr/lib/ -- /opt/cfx-server/FXServer +set citizen_dir /opt/cfx-server/citizen/ +set sv_licenseKey foo

The container logs contain this for me

[    c-server-monitor]   _______  ______
[    c-server-monitor]  |  ___\ \/ / ___|  ___ _ ____   _____ _ __
[    c-server-monitor]  | |_   \  /\___ \ / _ \ '__\ \ / / _ \ '__|
[    c-server-monitor]  |  _|  /  \ ___) |  __/ |   \ V /  __/ |
[    c-server-monitor]  |_|   /_/\_\____/ \___|_|    \_/ \___|_|
[    c-server-monitor] -------------------------------- monitor ---
[    c-server-monitor]
[    c-scripting-core] Creating script environments for monitor
[19:31:04][tx:v7.1.0] Profile 'default' starting...
[19:31:05][tx:SetupProfile] =========================================================
[19:31:05][tx:SetupProfile] Creating new profile folder...
[19:31:05][tx:SetupProfile] Server profile was saved in '/txData/default'
[19:31:05][tx:SetupProfile] =========================================================
[19:31:05][tx:WebServer] Listening on 0.0.0.0.
[19:31:05][tx]
[19:31:05][tx]    ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
[19:31:05][tx]    ┃                                    ┃
[19:31:05][tx]    ┃     All ready! Please access:      ┃
[19:31:05][tx]    ┃    http://your-public-ip:40120/    ┃
[19:31:05][tx]    ┃                                    ┃
[19:31:05][tx]    ┃   Use the PIN below to register:   ┃
[19:31:05][tx]    ┃                5770                ┃
[19:31:05][tx]    ┃                                    ┃
[19:31:05][tx]    ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
[19:31:05][tx]
[19:31:05][tx] To be able to access txAdmin from the internet open port 40120
[19:31:05][tx] on your OS Firewall as well as in the hosting company.
[19:31:05][tx:FXRunner] Please open txAdmin on the browser to configure your server.
[19:31:31][tx:AdminVault] Use this PIN to add a new master account:  5770
[19:31:34][tx:PlayerDatabase] Internal Database optimized. This applies only for the txAdmin internal database, and does not affect your MySQL or framework (ESX/QBCore/etc) databases.
[19:31:34][tx:PlayerDatabase] - 0 players that haven't connected in the past 16 days and had less than 2 hours of playtime.
[19:31:34][tx:PlayerDatabase] - 0 whitelist requests older than a week.
[19:31:34][tx:PlayerDatabase] - 0 whitelist approvals older than a week.

I don't really know much about how fivem works, but I can see that the sv_licenseKey value is being set correctly as the error message says it should be:

/config # tr '\0' '\n' < /proc/7/cmdline
/opt/cfx-server/ld-musl-x86_64.so.1
--library-path
/usr/lib/v8/:/lib/:/usr/lib/
--
/opt/cfx-server/FXServer
+set
citizen_dir
/opt/cfx-server/citizen/
+set
sv_licenseKey
foo

[frebib]

Ignore what I said above; we worked this out.
It's expected that the $LICENSE_KEY variable isn't passed through; you have to set it in the txadmin UI

[frebib]

The latest container build will now fail to start in this case. Remove the $LICENSE_KEY variable and set it in the txadmin webui