update README

Author: DerThorsten

README.md

@@ -7,15 +7,16 @@ A driver to run python code in a wasm environment, almost like running vanilla p
 
 
 
+
 ```bash
 # run in node backend
 pyjs_code_runner run script \
     node \
-    --conda-env     /home/web_user/env \
-    --mount         ~/src/pyjs/tests:/tests \
-    --script        main.py \
-    --work-dir      /tests \
-    --async-main           
+    --conda-env     /home/web_user/env           `# the emscripten-forge env in which to run the code` \
+    --mount         ~/src/pyjs/tests:/tests      `# Mount path to virtual filesytem <HOST_MACHINE_PATH>:<TARGET_PATH>` \
+    --script        main.py                      `# Path of the script to run (in virtual filesystem)` \
+    --work-dir      /tests                       `# Work directory in the virtual fileystem` \
+    --async-main                                 `# should a top-level async main function be called`
 
 ```
 
@@ -48,3 +49,5 @@ pyjs_code_runner run script \
     --headless          
 
 ```
+
+