Add sample NATS server with mutual TLS auth

Author: rubiojr

configs/nats-tls.conf

@@ -0,0 +1,53 @@
+ADMIN: admin
+ADMIN_SECRET: admin-secret 
+USER: user
+USER_SECRET: user-secret
+
+# Server cert:
+#
+# mkcert \
+#   -key-file key.pem \
+#   -cert-file cert.pem \
+#   server
+# 
+# Client cert:
+#
+# mkcert \
+#   -client \
+#   -key-file client-key.pem \
+#   -cert-file client-cert.pem \
+#   server
+#
+tls {
+  cert_file /etc/hashup/server.pem
+  key_file /etc/hashup/server-key.pem
+  ca_file /etc/hashup/ca.pem
+  verify: true
+}
+allow_non_tls: false
+
+jetstream {
+  store_dir /data/hashup/storage
+  # 1GB
+  max_memory_store: 1073741824
+  # 100GB
+  max_file_store: 107374182400
+}
+
+# Required for clustering
+server_name=hashup
+
+# monitoring
+http: 127.0.0.1:8222
+# nats port
+port: 4222
+
+accounts: {
+  $SYS: {
+    users: [{user: $ADMIN, password: $ADMIN_SECRET}]
+  }
+  HASHUP: {
+    jetstream: enabled
+    users: [{user: $USER, password: $USER_SECRET}]
+  }
+}