Organize backend into product executable and shared Go modules

backend/product/config.example.yml

@@ -0,0 +1,33 @@
+# SXCHNGE-owned Mongo database and JWT key. Never point these at Sendico.
+http_server:
+  listen_address: 127.0.0.1:8082
+  read_header_timeout: 5
+  shutdown_timeout: 10
+database:
+  driver: mongodb
+  settings:
+    uri_env: SXCHNGE_MONGO_URI
+    database: sxchnge
+api:
+  middleware:
+    domain_env: SXCHNGE_DOMAIN
+    api_endpoint_env: SXCHNGE_API_ENDPOINT
+    api_protocol_env: SXCHNGE_API_PROTOCOL
+    signature:
+      algorithm: HS256
+      secret_key_env: SXCHNGE_JWT_SECRET
+    CORS:
+      allowed_origins: ["http://localhost:5126"]
+      allowed_methods: ["GET", "POST", "PATCH", "DELETE", "OPTIONS"]
+      allowed_headers: ["Content-Type", "Authorization", "X-Auth-Transport", "X-CSRF-Protection"]
+      allow_credentials: true
+      max_age: 300
+    token:
+      expiration_hours:
+        account: 1
+        refresh: 720
+      length: 32
+    password:
+      token_length: 32
+      check:
+        min_length: 12