chore: rename simple_bank to api_tmpl and clean up for template use

Rename the module, proto service, and all identifiers from simple_bank/
SimpleBank to api_tmpl/ApiTmpl, and regenerate the gRPC/gateway/swagger/
mock code accordingly.

- Scrub real secrets (SMTP password, auth token secret) from api.env/
  api_test.env, untrack them, and add api.env.example/api_test.env.example
- Remove committed build artifacts (tmp/main, tmp/build-errors.log,
  dbml-error.log) and gitignore them going forward
- Fix Dockerfile paths (build target, migrations copy) that referenced a
  stale project layout
- Rewrite README to match the actual cmd/ + internal/ structure and add a
  "using this as a template" section

docs/swagger/api_tmpl.swagger.json

@@ -1,17 +1,17 @@
 {
   "swagger": "2.0",
   "info": {
-    "title": "Simple Bank API",
+    "title": "API Template",
     "version": "0.0.1",
     "contact": {
       "name": "fvideira",
-      "url": "https://github.com/FernandoJVideira/simple_bank",
-      "email": "03.pleaser-minster@icloud.com"
+      "url": "https://github.com/FernandoJVideira/api_tmpl",
+      "email": "support@example.com"
     }
   },
   "tags": [
     {
-      "name": "SimpleBank"
+      "name": "ApiTmpl"
     }
   ],
   "consumes": [
@@ -24,8 +24,8 @@
     "/v1/create_user": {
       "post": {
         "summary": "Create User",
-        "description": "Create a new user in the Simple Bank system.",
-        "operationId": "SimpleBank_CreateUser",
+        "description": "Create a new user.",
+        "operationId": "ApiTmpl_CreateUser",
         "responses": {
           "200": {
             "description": "A successful response.",
@@ -51,15 +51,15 @@
           }
         ],
         "tags": [
-          "SimpleBank"
+          "ApiTmpl"
         ]
       }
     },
     "/v1/login_user": {
       "post": {
         "summary": "Login User",
-        "description": "Login an existing user in the Simple Bank system.",
-        "operationId": "SimpleBank_LoginUser",
+        "description": "Login an existing user.",
+        "operationId": "ApiTmpl_LoginUser",
         "responses": {
           "200": {
             "description": "A successful response.",
@@ -85,15 +85,15 @@
           }
         ],
         "tags": [
-          "SimpleBank"
+          "ApiTmpl"
         ]
       }
     },
     "/v1/update_user": {
       "patch": {
         "summary": "Update User",
-        "description": "Update an existing user in the Simple Bank system.",
-        "operationId": "SimpleBank_UpdateUser",
+        "description": "Update an existing user.",
+        "operationId": "ApiTmpl_UpdateUser",
         "responses": {
           "200": {
             "description": "A successful response.",
@@ -119,15 +119,15 @@
           }
         ],
         "tags": [
-          "SimpleBank"
+          "ApiTmpl"
         ]
       }
     },
     "/v1/verify_email": {
       "get": {
         "summary": "Verify Email",
-        "description": "Verify user's email in the Simple Bank system.",
-        "operationId": "SimpleBank_VerifyEmail",
+        "description": "Verify a user's email.",
+        "operationId": "ApiTmpl_VerifyEmail",
         "responses": {
           "200": {
             "description": "A successful response.",
@@ -158,7 +158,7 @@
           }
         ],
         "tags": [
-          "SimpleBank"
+          "ApiTmpl"
         ]
       }
     }

docs/swagger/swagger-initializer.js

@@ -3,7 +3,7 @@ window.onload = function () {
 
   // the following lines will be replaced by docker/configurator, when it runs in a docker-container
   window.ui = SwaggerUIBundle({
-    url: "simple_bank.swagger.json",
+    url: "api_tmpl.swagger.json",
     dom_id: "#swagger-ui",
     deepLinking: true,
     presets: [SwaggerUIBundle.presets.apis, SwaggerUIStandalonePreset],