Marked build.sh as executable and updated README.md to note that build.sh exists and is useful

README.md

@@ -46,6 +46,14 @@ If you're using a DLU client, then you don't need to change anything. But if you
 Make sure packages like `gcc`, `cmake`, and `zlib` are installed. Depending on the distribution, these packages might already be installed. Note that on systems like Ubuntu, you will need the `zlib1g-dev` package so that the header files are available.
 
 **Build the repository**
+You can either run `build.sh` when in the root folder of the repository:
+
+```bash
+./build.sh
+```
+
+Or manually run the commands used in `build.sh`:
+
 ```bash
 # Create the build directory, preserving it if it already exists
 mkdir -p build