feat: Add health check info on readme (#22)

.github/workflows/release.yml

@@ -1,4 +1,4 @@
-name: Release
+name: release
 
 on:
   push:

.github/workflows/verify.yml

@@ -1,4 +1,4 @@
-name: Verify
+name: verify
 
 on:
   push:

README.md

@@ -231,8 +231,27 @@ curl --location --request GET 'http://localhost:8000/v1/delivery-attempts/d72719
 }
 ```
 
+### Health check
+
+The health check server is running on port defined by envvar POSTMAND_HEALTH_CHECK_HTTP_PORT (defaults to 8001).
+
+```bash
+curl --location --request GET 'http://localhost:8001/healthz'
+```
+
+```javascript
+{
+  "success":true
+}
+```
+
+### Environment variables
+
+All environment variables is defined on file local.env.
+
 ## How to build docker image
 
 ```
 docker build -f Dockerfile -t postmand .
 ```
+

local.env

@@ -1,7 +1,7 @@
-POSTMAND_DATABASE_URL='postgres://user:pass@localhost:5432/postmand?sslmode=disable'
-# See https://github.com/golang-migrate/migrate/tree/master/source/file
-POSTMAND_DATABASE_MIGRATION_DIR='file://db/migrations'
-POSTMAND_DATABASE_MAX_OPEN_CONNS='2'
-POSTMAND_POLLING_INTERVAL='1000'
-POSTMAND_HTTP_PORT='8000'
-POSTMAND_HEALTH_CHECK_HTTP_PORT='8001'
+POSTMAND_DATABASE_URL='postgres://user:pass@localhost:5432/postmand?sslmode=disable' # main database
+POSTMAND_TEST_DATABASE_URL='postgres://user:pass@localhost:5432/postmand_test?sslmode=disable' # test database
+POSTMAND_DATABASE_MIGRATION_DIR='file://db/migrations' # See https://github.com/golang-migrate/migrate/tree/master/source/file
+POSTMAND_DATABASE_MAX_OPEN_CONNS='2' # sets the maximum number of open connections to the database
+POSTMAND_POLLING_INTERVAL='1000' # worker database polling interval (in miliseconds)
+POSTMAND_HTTP_PORT='8000' # port for the api server
+POSTMAND_HEALTH_CHECK_HTTP_PORT='8001' # port for health check server