Create README.md

Author: fd

README.md

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+# dkr-util
+
+## Usage
+
+```
+usage: dkr [<flags>] <command> [<args> ...]
+
+Docker utilities
+
+Flags:
+  --help     Show context-sensitive help (also try --help-long and --help-man).
+  --version  Show application version.
+
+Commands:
+  help [<command>...]
+    Show help.
+
+
+  package [<flags>]
+    Make a new image without running docker
+
+    -i, --input=FILE   Tar archive to use
+    -o, --output=FILE  Path to output Tar archive
+
+  push [<flags>]
+    Push an image archive to a registry
+
+    -i, --input=FILE  Tar archive to use
+
+  cat-tags [<flags>]
+    Print the tags conatined in an image archive
+
+    -i, --input=FILE  Tar archive to use
+```
+
+## .docker.json format
+
+```json5
+{
+  "repo_tags": ["<tag>"], // required
+  "author": "<author>",
+  "config": {
+    "User": "<User>",
+    "Memory": 123,
+    "MemorySwap": 123,
+    "CpuShares": 100,
+    "ExposedPorts": {
+      "80/tcp": {}
+    },
+    "Env": [
+      "VAR=val",
+    ],
+    "Entrypoint": ["cmd", "args"],
+    "Cmd": ["cmd", "args"],
+    "Volumes": {
+      "/data:ro": {}
+    },
+    "WorkingDir": "<WorkingDir>"
+  }
+}
+```