Add an example and testing/coverage info.

.gitignore

@@ -1,2 +1,5 @@
+# Deno test coverage output.
+.coverage
+
 # VS Code settings.
 .vscode/

README.md

@@ -4,6 +4,40 @@ A very minimal `.env` parser for Deno.
 
 Requires `--allow-read` and `--allow-env` permissions (for obvious reasons).
 
+## Example
+
+```ts
+import dotenv from "https://deno.land/x/minimal_dotenv/minimal_dotenv.ts";
+
+await dotenv();
+
+// Optionally, you can specify the filename/full path:
+// await dotenv(".env.different");
+
+// With .env file containing MINIMAL_DOTENV="working" outputs:
+// minimal_dotenv is working
+console.log(`minimal_dotenv is ${Deno.env.get("MINIMAL_DOTENV")}`);
+```
+
+<details>
+<summary>Testing & Coverage</summary>
+
+To test and generate code coverage (requires
+[LCOV](https://github.com/linux-test-project/lcov)'s `genhtml` to output HTML).
+
+```sh
+# Run the tests and emit coverage data.
+deno test --allow-read --allow-env --coverage=.coverage
+# Convert Deno's output coverage to LCOV.
+deno coverage --lcov .coverage > .coverage/report.lcov
+# Convert LCOV to HTML.
+genhtml -o .coverage/html .coverage/report.lcov
+# Open the coverage in your browser.
+firefox .coverage/html/index.html
+```
+
+</details>
+
 ## License
 
 Licensed with the [AGPL-3.0-or-later license](LICENSE).