Create README.md

README.md

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+# `tar-utils`
+
+## Usage
+
+```
+usage: x-tar [<flags>] <command> [<args> ...]
+
+Tar utilities
+
+Flags:
+  --help     Show context-sensitive help (also try --help-long and --help-man).
+  --version  Show application version.
+
+Commands:
+  help [<command>...]
+    Show help.
+
+
+  build [<flags>] [<context-dir>]
+    Make a new tar file
+
+    -t, --tarfile=FILE  Tarfile location
+    -o, --output=FILE   Path to output Tar archive
+```
+
+## Tarfile format
+
+```
+COPY <src> <dst>
+MKDIR <src> <dst>
+CHMOD [-R] <mode> <targets>
+CHOWN [-R] (<user> | <user>:<group> | :<group>) <targets>
+```
+