feat(anubis): add /healthz route to metrics server (#843)

* feat(anubis): add /healthz route to metrics server

Also add health check test for Docker Compose and update documentation
for health checking Anubis with Docker Compose.

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore: spelling

Signed-off-by: Xe Iaso <me@xeiaso.net>

---------

Signed-off-by: Xe Iaso <me@xeiaso.net>

docs/manifest/deployment.yaml

@@ -36,6 +36,18 @@ spec:
               mountPath: /conf
           ports:
             - containerPort: 80
+          readinessProbe:
+            httpGet:
+              path: /
+              port: 80
+            initialDelaySeconds: 1
+            periodSeconds: 10
+          livenessProbe:
+            httpGet:
+              path: /
+              port: 80
+            initialDelaySeconds: 10
+            periodSeconds: 20
         - name: anubis
           image: ghcr.io/techarohq/anubis:main
           imagePullPolicy: Always
@@ -80,4 +92,15 @@ spec:
               type: RuntimeDefault
           envFrom:
             - secretRef:
-                name: anubis-docs-thoth
+          readinessProbe:
+            httpGet:
+              path: /healthz
+              port: 9090
+            initialDelaySeconds: 1
+            periodSeconds: 10
+          livenessProbe:
+            httpGet:
+              path: /healthz
+              port: 9090
+            initialDelaySeconds: 10
+            periodSeconds: 20