Add quickstart section

README.md

@@ -12,6 +12,7 @@ dependencies to be installed using [Poetry](https://python-poetry.org/) using it
 **Documentation**
 
 * [Installation](#installation)
+* [Quick Start](#quick-start)
 * [Usage](#usage)
 * [Known Drawbacks and Problems](#known-drawbacks-and-problems)
 * [Why would I use this?](#why-would-i-use-this) (What problems does this solve?)
@@ -53,6 +54,49 @@ same environment as Tox:
 ~ $: /path/to/my/automation/virtualenv/bin/pip install tox-poetry-installer
 ```
 
+
+## Quick Start
+
+To require a Tox environment install all it's dependencies from the Poetry lockfile, add the
+`require_locked_deps = true` option to the environment configuration and remove all version
+specifiers from the dependency list. The versions to install will be taken from the lockfile
+directly:
+
+```ini
+[testenv]
+description = Run the tests
+require_locked_deps = true
+deps =
+    pytest
+    pytest-cov
+    black
+    pylint
+    mypy
+commands = ...
+```
+
+To require specific dependencies be installed from the Poetry lockfile, and let the rest be
+installed using the default Tox installation method, add the suffix `@poetry` to the dependencies.
+In the example below the `pytest`, `pytest-cov`, and `black` dependencies will be installed using
+the lockfile while `pylint` and `mypy` will be installed using the versions specified here:
+
+```ini
+[testenv]
+description = Run the tests
+require_locked_deps = true
+deps =
+    pytest@poetry
+    pytest-cov@poetry
+    black@poetry
+    pylint >=2.5.0
+    mypy == 0.770
+commands = ...
+```
+
+**Note:** Regardless of the settings outlined above, all dependencies of the project package (the
+one Tox is testing) will always be installed from the lockfile.
+
+
 ## Usage
 
 After installing the plugin to a project, your Tox automation is already benefiting from the