feat: Adding openapi example API

app/README.md

@@ -0,0 +1,24 @@
+# ETA API v2
+
+This is the second generation of the ETA API developed on GoLang using OpenAPI to auto document and generate api endpoints.
+
+# OpenApi Generator
+
+With the following command the generator tool can be installed
+
+```.{sh}
+go install github.com/deepmap/oapi-codegen/cmd/oapi-codegen@latest
+```
+
+
+
+# Deployment
+
+The details on how to deploy are described here
+
+## DOTENV
+
+```{.sh}
+SQL_DSN="{USER}:{PASS}@tcp({HOST}:{PORT})/{DB}?charset=utf8mb4&parseTime=true&loc=Local"
+```
+