fix readme (#6068)

## Motivation

Env variables some times are not set properly, which affects tests and building.

README.md

@@ -97,7 +97,12 @@ Read [this](https://github.com/golang/go/wiki/Modules#how-to-install-and-activat
 
 ### Setting Up Local Dev Environment
 
-Building is supported on OS X, Linux, FreeBSD, and Windows.
+Building is supported on: 
+- Linux, GLIBC 2.34+ is required
+- MacOS 13 (Intel) and MacOS 14 (Arm) and newer
+- Windows 10 and newer
+
+FreeBSD is not officially supported.
 
 Install [Go 1.22 or later](https://golang.org/dl/) for your platform, if you haven't already.
 
@@ -112,6 +117,24 @@ Before building we need to set up the golang environment. Do this by running:
 make install
 ```
 
+Make sure the environment is set up correctly:
+
+```bash
+make go-env-test
+```
+
+**CGO_CFLAGS** must be set to "-I<absolute_path_to_repo>/go-spacemesh/build/ -DSQLITE_ENABLE_DBSTAT_VTAB=1"
+**CGO_LDFLAGS** must be set to "-L<absolute_path_to_repo>/go-spacemesh/build/ -Wl,-rpath,$ORIGIN -Wl,-rpath,<absolute_path_to_repo>/go-spacemesh/build/"
+
+Make sure you have **OpenCL** library installed
+
+To check if setup was configured successfully, try to run: 
+```bash
+make test
+```
+
+There shouldn't be any build errors, but please note that running the tests will take some time.
+
 ### How to run standalone node?
 
 After you got a binary standalone fully functional network can be launched