Update README.md

Author: jushar

README.md

@@ -40,11 +40,26 @@ Download and install the [EditorConfig](https://visualstudiogallery.msdn.microso
 4. Execute: `win-install-data.bat`
 
 #### Linux
-1. Execute `utils/premake5_x86 gmake` (32-bit OS) or `utils/premake5_x64 gmake` (64-bit OS)
+Building MTA:SA is only supported on 64-bit Linux OSes. You can however cross-compile a 32-bit version using _gcc-multilib_.
+1. Execute `utils/premake5 gmake`
 2. `cd Build`
 3. Run `make config=release_x86` to build the 32-bit server and `make config=release_x64` to build the 64-bit server (or use `debug` instead of `release` to run an unoptimized debug build)
 4. Execute `linux-install-data.sh` (optional step)
 
+#### Linux: Docker Build Environment
+If you have problems resolving the required dependencies or want maximum compatibility, you can use our dockerized build environment that ships all needed dependencies. We also use this environment to build the official binaries.
+
+64-bit target:
+```
+docker run -it -v `pwd`:/mtasa-blue multitheftauto/mtasa-blue
+```
+
+32-bit target:
+```
+docker run -it -v `pwd`:/mtasa-blue -e BUILD_BITS=32 multitheftauto/mtasa-blue
+```
+If the current directory is a valid git repository clone, it will use this as the build source. If not, it will create a (shallow) clone. After compiling, you will find the resulting binaries in `./Bin`.
+
 ### Premake FAQ
 #### How to add new C++ source files?
 Just execute `win-create-projects.bat`.