update README

Author: blacktop

.gitignore

@@ -1,4 +1,6 @@
 *.bu
 *.decompressed
 .vscode
-dyld_shared_cache
+dyld_shared_cache*
+System
+projects

README.md

@@ -82,6 +82,19 @@ $ docker run --init -it --rm \
              blacktop/ghidra server
 ```
 
+### Headless
+
+```bash
+$ docker run --init -it --rm \
+             --name ghidra-headless \
+             --cpus 2 \
+             --memory 4g \
+             -e MAXMEM=4G \
+             -v `pwd`:/samples \
+             --link ghidra-server \
+             blacktop/ghidra:beta support/analyzeHeadless ghidra://ghidra-server:13100/Apple/12.4.1/ -import /samples/dyld_shared_cache -connect blacktop -p -commit "Loading Dyld."
+```
+
 ## TODO
 
 - [ ] Figure out how to add `--network none` :wink: