diff --git a/dist/index.js b/dist/index.js
index b1c56d5..a0c141d 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -74669,7 +74669,13 @@ ZipStream.prototype.finalize = function() {
 Object.defineProperty(exports, "__esModule", ({ value: true }));
 exports.getContainerRegistryURL = exports.getRepositoryMetadata = void 0;
 async function getRepositoryMetadata(repository, token) {
-    const response = await fetch(`${process.env.GITHUB_API_URL}/repos/${repository}`);
+    const response = await fetch(`${process.env.GITHUB_API_URL}/repos/${repository}`, {
+        method: 'GET',
+        headers: {
+            Authorization: `Bearer ${token}`,
+            Accept: 'application/vnd.github.v3+json'
+        }
+    });
     if (!response.ok) {
         throw new Error(`Failed to fetch repository metadata due to bad status code: ${response.status}`);
     }
@@ -74678,7 +74684,7 @@ async function getRepositoryMetadata(repository, token) {
     if (!data.id || !data.owner.id) {
         throw new Error(`Failed to fetch repository metadata: unexpected response format`);
     }
-    return { repoId: data.id, ownerId: data.owner.id };
+    return { repoId: String(data.id), ownerId: String(data.owner.id) };
 }
 exports.getRepositoryMetadata = getRepositoryMetadata;
 async function getContainerRegistryURL() {
@@ -74816,7 +74822,7 @@ function stageActionFiles(actionDir, targetDir) {
                 actionYmlFound = true;
             }
             // Filter out hidden folers like .git and .github
-            return !basename.startsWith('.');
+            return basename === '.' || !basename.startsWith('.');
         }
     });
     if (!actionYmlFound) {
@@ -74992,7 +74998,7 @@ async function uploadManifest(manifestJSON, manifestEndpoint, b64Token) {
     if (putResponse.status !== 201) {
         throw new Error(`Unexpected response from PUT manifest ${putResponse.status}`);
     }
-    const digestResponseHeader = putResponse.headers['Docker-Content-Digest'];
+    const digestResponseHeader = putResponse.headers['docker-content-digest'];
     if (digestResponseHeader === undefined) {
         throw new Error(`No digest header in response from PUT manifest ${manifestEndpoint}`);
     }
@@ -75114,7 +75120,7 @@ async function run(pathInput) {
         const { packageURL, manifestDigest } = await ghcr.publishOCIArtifact(token, containerRegistryURL, repository, semanticVersion.raw, archives.zipFile, archives.tarFile, manifest, true);
         core.setOutput('package-url', packageURL.toString());
         core.setOutput('package-manifest', JSON.stringify(manifest));
-        core.setOutput('package-manifest-sha', `sha256:${manifestDigest}`);
+        core.setOutput('package-manifest-sha', manifestDigest);
     }
     catch (error) {
         // Fail the workflow run if an error occurs
diff --git a/src/api-client.ts b/src/api-client.ts
index 0db3011..bb5cd9c 100644
--- a/src/api-client.ts
+++ b/src/api-client.ts
@@ -6,7 +6,14 @@ export async function getRepositoryMetadata(
   token: string
 ): Promise<{ repoId: string; ownerId: string }> {
   const response = await fetch(
-    `${process.env.GITHUB_API_URL}/repos/${repository}`
+    `${process.env.GITHUB_API_URL}/repos/${repository}`,
+    {
+      method: 'GET',
+      headers: {
+        Authorization: `Bearer ${token}`,
+        Accept: 'application/vnd.github.v3+json'
+      }
+    }
   )
 
   if (!response.ok) {
@@ -24,7 +31,7 @@ export async function getRepositoryMetadata(
     )
   }
 
-  return { repoId: data.id, ownerId: data.owner.id }
+  return { repoId: String(data.id), ownerId: String(data.owner.id) }
 }
 
 export async function getContainerRegistryURL(): Promise<URL> {
diff --git a/src/fs-helper.ts b/src/fs-helper.ts
index 6f21525..f9f7477 100644
--- a/src/fs-helper.ts
+++ b/src/fs-helper.ts
@@ -109,7 +109,7 @@ export function stageActionFiles(actionDir: string, targetDir: string) {
       }
 
       // Filter out hidden folers like .git and .github
-      return !basename.startsWith('.')
+      return basename === '.' || !basename.startsWith('.')
     }
   })
 
diff --git a/src/ghcr-client.ts b/src/ghcr-client.ts
index 0280a8e..d200424 100644
--- a/src/ghcr-client.ts
+++ b/src/ghcr-client.ts
@@ -202,7 +202,7 @@ async function uploadManifest(
     )
   }
 
-  const digestResponseHeader = putResponse.headers['Docker-Content-Digest']
+  const digestResponseHeader = putResponse.headers['docker-content-digest']
   if (digestResponseHeader === undefined) {
     throw new Error(
       `No digest header in response from PUT manifest ${manifestEndpoint}`
diff --git a/src/main.ts b/src/main.ts
index 82cc783..42a8130 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -78,7 +78,7 @@ export async function run(pathInput: string): Promise<void> {
 
     core.setOutput('package-url', packageURL.toString())
     core.setOutput('package-manifest', JSON.stringify(manifest))
-    core.setOutput('package-manifest-sha', `sha256:${manifestDigest}`)
+    core.setOutput('package-manifest-sha', manifestDigest)
   } catch (error) {
     // Fail the workflow run if an error occurs
     if (error instanceof Error) core.setFailed(error.message)