fix: include self-hosted apps

cmd/proxy/Dockerfile

@@ -42,7 +42,7 @@ RUN apk add --update git git-lfs mercurial openssh-client subversion procps foss
     mkdir -p /usr/local/go
 
 # Add git-credential-github-app for native integration with GitHub Apps
-RUN wget -O git-credential-github-app.tar.gz https://github.com/bdellegrazie/git-credential-github-app/releases/download/v0.2.0/git-credential-github-app_v0.2.0_Linux_x86_64.tar.gz \
+RUN wget -O git-credential-github-app.tar.gz https://github.com/bdellegrazie/git-credential-github-app/releases/download/v0.3.0/git-credential-github-app_v0.2.0_Linux_x86_64.tar.gz \
   && tar xvzf 'git-credential-github-app.tar.gz' git-credential-github-app -C /usr/local/bin \
   && rm git-credential-github-app.tar.gz || true;
 

docs/content/configuration/authentication.md

@@ -337,3 +337,20 @@ This instructs Git to authenticate with the GitHub App and cache the results for
 
 Now, builds executed through the Athens proxy should be able to clone the `github.com/your-org/your-repo` dependency over GitHub Apps.
 
+### GitHub Enterprise Self-hosted
+
+To authenticate against a self-hosted GitHub Enterprise, the instructions are the same for GitHub hosted Apps
+with the exception for the Git config, which should include your domain, as follows:
+
+```
+[credential "https://github.example.com/your-org"]
+    helper = "github-app -username <app-name> -appId <app-id> -privateKeyFile <path-to-private-key> -installationId <installation-id> -domain github.example.com"
+    useHttpPath = true
+
+[credential "https://github.example.com"]
+    helper = "cache --timeout=3600"
+
+[url "https://github.example.com"]
+    insteadOf = ssh://[email protected]
+```
+