feat: add boltz client client (#20)

* feat: add boltz-client to regtest

data/boltz-nginx/default.conf

@@ -0,0 +1,49 @@
+upstream boltz {
+    server boltz:9001;
+}
+
+upstream boltzr {
+    server boltz:9005;
+}
+
+upstream ws {
+    server boltz:9004;
+}
+
+server {
+    listen 9001;
+    listen [::]:9001;
+    server_name localhost;
+
+    add_header Access-Control-Allow-Origin "*" always;
+    add_header Access-Control-Allow-Methods 'GET, PATCH, DELETE, POST, OPTIONS' always;
+    add_header Access-Control-Allow-Headers "*" always;
+
+    proxy_set_header Host $http_host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+
+    if ($request_method = OPTIONS) {
+        return 204;
+    }
+
+    location /v2/ws {
+        proxy_pass http://ws/;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "Upgrade";
+    }
+
+    location ~ ^/v2/(lightning|swap/rescue|swap/restore) {
+        proxy_pass http://boltzr;
+    }
+
+    location /streamswapstatus {
+        proxy_pass http://boltzr;
+    }
+
+    location / {
+        proxy_pass http://boltz;
+    }
+}