CS 1.6 HLDS + AMX MOD X + CSDM

Build & run

Create .env configuration file from example file:
```
$ cp example.env .env
```
Build image with HLDS Server. It includes raw Steam HLDS + Metamod + DProto + AMX MOD X:
```
$ docker-compose build hlds
```
Build custom server image based on hlds image. It includes maps, configuration and the other customization stuff:
```
$ docker-compose build server
```
Edit .env configuration variables if needed (see image entrypoint file hlds_run.sh if you want to figure out how variables are used).
Start your server:
```
$ docker-compose up -d server
```
Enjoy ;)