Adds a more detailed README (#5)

README.md

@@ -1,3 +1,39 @@
 # dynatrace-bootstrapper
 
-TODO: Add todod
+The `dynatrace-bootstrapper` is a small CLI binary built into a [Dynatrace CodeModule](https://gallery.ecr.aws/dynatrace/dynatrace-codemodules) (after version `<to-be-determined-codemodule-version>`) so that it can be used in conjunction with the [dynatrace-operator](https://github.com/Dynatrace/dynatrace-operator) to optimize the download and configuration of a CodeModule in Kubernetes.
+
+## Responsibilities
+
+- Copy a Dynatrace CodeModule to a target directory
+- Configure the Dynatrace CodeModule according to the configuration options provided
+
+## How to use
+
+### Args
+
+#### `--source`
+
+*Example*: `--source="/opt/dynatrace/oneagent"`
+
+- ⚠️This is a **required** arg⚠️
+- The `--source` arg defines the base path where to copy the CodeModule FROM.
+
+#### `--target`
+
+*Example*: `--target="example/bins/1.2.3"`
+
+- ⚠️This is a **required** arg⚠️
+- The `--target` arg defines the base path where to copy the CodeModule TO.
+
+#### `--work`
+
+*Example*: `--work="/example/work"`
+
+- This is an **optional** arg
+- The `--work` arg defines the base path for a tmp folder, this is where the command will do its work, to make sure the operations are atomic. It must be on the same disk as the target folder.
+
+## Development
+
+- To run tests: `make test`
+- To run linting: `make lint`
+- To build a testing image: `make build`