fix: hotfix for tmf url (#86)

The `externalSettlementsEndpoint` is very specific to the TMF implementation. This fix will be merged into master to deal with the technical-debt, and the next major version should include a re-factor to fix this in a general manner. I have updated the following story mojaloop/project#2639 to address this going forward.

Fixes:
- bump to patch version
- added missing path for TMF service
- added .nvmrc

.nvmrc

@@ -0,0 +1 @@
+16.13.0

src/handlers/settlement-window-close.js

@@ -10,7 +10,7 @@ const handler = (router, routesContext) => {
         // if an external settlement service is provided use that
         if (routesContext.config.externalSettlementsEndpoint) {
             try {
-                const resp = await axios.post(`${routesContext.config.externalSettlementsEndpoint}`, {});
+                const resp = await axios.post(`${routesContext.config.externalSettlementsEndpoint}/settlement-windows/current/close`, {});
                 if (resp.status === 202) {
                     ctx.response.status = 200;
                 } else {

src/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@mojaloop/finance-portal-backend-service",
-  "version": "15.4.0",
+  "version": "15.4.1",
   "description": "The backend service to support the finance portal web ui. Essentially a thin wrapper around SQL queries.",
   "license": "Apache-2.0",
   "contributors": [