Update README

README.md

@@ -1,3 +1,34 @@
 # run-with-podman
 
 Execute a script in a podman container
+
+Usage: run-with-podman.sh --file FILE [--file-path PATH] [--mode [0,1,2]]
+                              [--mask-dir PATH] [--image IMAGE_NAME] [--force-systemd]
+                              [--help] [--] $OPTIONS
+
+    --file,-f FILE
+        The local script to execute in the container (typically sent from your IDE)
+
+    --file-path PATH
+        Path that the script operates on (Default: the --file directory)
+
+    --mode,-m 0,1,2
+        0. Nonpersistent container (always recreate) (Default)
+        1. Persistent container
+        2. Recreate persistent container
+
+    --mask-dir PATH
+        Hide this directory from the host OS, store contents in the container only (Default: unset)
+        (Useful for capturing output in the container only for easy reset)
+
+    --image,-i IMAGE_NAME
+        The name of the image to execute the script (Default: fedora:latest)
+
+    --force-systemd
+        Force container to init with systemd support
+
+    --help,-h
+        Print this help message and exit
+
+    -- [additional arguments to pass to --file FILE]
+        Parsed as "quoted string"