Add Linux deployment installer, supervised services and readiness checks

deploy/linux/nginx.conf.example

@@ -0,0 +1,29 @@
+# Replace domain and certificate paths. Install manually after nginx -t.
+# Root path on its own HTTPS hostname; upstream must remain loopback-only.
+server {
+    listen 80;
+    server_name buganalysis.example.org;
+    return 308 https://buganalysis.example.org$request_uri;
+}
+server {
+    listen 443 ssl;
+    server_name buganalysis.example.org;
+    ssl_certificate /etc/letsencrypt/live/buganalysis.example.org/fullchain.pem;
+    ssl_certificate_key /etc/letsencrypt/live/buganalysis.example.org/privkey.pem;
+    ssl_protocols TLSv1.2 TLSv1.3;
+    client_max_body_size 768m;
+    client_body_timeout 120s;
+    location / {
+        proxy_pass http://127.0.0.1:8080;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header X-Forwarded-For $remote_addr;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_request_buffering off;
+        proxy_read_timeout 180s;
+        proxy_send_timeout 180s;
+        proxy_cache off;
+        proxy_no_cache 1;
+    }
+}