Finish implementing the tagExists action helper script

scripts/tagExists.mjs

@@ -1,11 +1,28 @@
+import axios from "axios";
+
 const {
 	TAG_NAME,
-	FORGEJO_API_URL,
+	FORGEJO_API_URL: API_URL,
-	FORGEJO_REPOSITORY,
+	FORGEJO_REPOSITORY: REPO,
-	FORGEJO_REPOSITORY_OWNER,
+	FORGEJO_TOKEN: TOKEN,
 } = process.env;
 
+async function main() {
+	const requestURL = `${API_URL}/repos/${REPO}/tags/${TAG_NAME}`;
 
-console.log(process.env)
+	const response = await axios.get(
+		requestURL,
+		{
+			headers: { Authorization: `token ${TOKEN}` },
+			validateStatus: () => true,
+		},
+	);
 
+	// We actually *want* an error when the tag exists, instead of when
+	// it doesn't
+	if (response.status === 200) {
 		process.exit(1);
+	};
+};
+
+main();