chore: template the pm2 config and stop it being the only copy

.gitignore

@@ -76,4 +76,9 @@ typings/
 .serverless
 
 # FuseBox cache
-.fusebox/src/config/fresh.js
+.fusebox/
+src/config/fresh.js
+
+# PM2 process definition: holds the production DB password in plaintext.
+# Use ecosystem.config.example.js as the template.
+ecosystem.config.js

ecosystem.config.example.js

@@ -0,0 +1,50 @@
+// PM2 process definition for the production event-source indexer.
+//
+// Copy this to `ecosystem.config.js` ON THE SERVER and fill in the real values.
+// The real file is intentionally NOT tracked: it holds the production database
+// password in plaintext. It is also the only copy that exists, so if you change
+// it, back it up off-box as well (see "Backups" below).
+//
+//   cp ecosystem.config.example.js ecosystem.config.js
+//   $EDITOR ecosystem.config.js
+//   pm2 restart event-source --update-env
+//
+// Every value below is read by src/config/prod.js straight off process.env, so
+// the names here must match that file exactly.
+//
+// Backups: the live file lives at
+//   /home/ubuntu/apps/event-source/ecosystem.config.js
+// on app.cambiatus.io. Keep a copy somewhere private and chmod 600 — losing it
+// means reconstructing the DB credentials by hand.
+
+module.exports = {
+  apps: [
+    {
+      name: 'event-source',
+      time: true,
+      script: 'src/app.js',
+      watch: false,
+      exec_mode: 'fork',
+      autorestart: true,
+      env: {
+        NODE_ENV: 'prod',
+
+        // Chain
+        BLOCKCHAIN_INIT_BLOCK: '60000000',
+        BLOCKCHAIN_TOKEN_CONTRACT: 'cambiatus.tk',
+        BLOCKCHAIN_COMMUNITY_CONTRACT: 'cambiatus.cm',
+        // Optional: src/config/prod.js defaults it to cambiatus.es when unset.
+        BLOCKCHAIN_ESCROW_CONTRACT: 'cambiatus.es',
+        BLOCKCHAIN_URL: 'https://<nodeos-host>',
+
+        // Database — same Postgres the backend writes to.
+        DB_USER: '<user>',
+        DB_PASS: '<password>',
+        DB_HOST: '<rds-endpoint>',
+        DB_NAME: '<database>',
+
+        EVENT_SOURCE_HTTP_PORT: 3001
+      }
+    }
+  ]
+}