Merge pull request #313 from Brikaa/docs

docs: NodeJS version, testing packages locally

readme.md

@@ -100,7 +100,7 @@ POST https://emkc.org/api/v2/piston/execute
 
 - Docker
 - Docker Compose
-- Node JS
+- Node JS (>= 13, preferably >= 15)
 
 ### After system dependencies are installed, clone this repository:
 
@@ -139,6 +139,22 @@ docker run \
     ghcr.io/engineer-man/piston
 ```
 
+## Piston for testing packages locally
+
+### Host System Package Dependencies
+
+- Same as [All In One](#All-In-One)
+
+### Installation
+
+```sh
+# Build the Docker containers
+./piston start
+
+# For more help
+./piston help
+```
+
 <br>
 
 # Usage