Config file with Port number.

Started implementing typespec for OpenAPI spec.

spec/tspconfig.yaml

@@ -0,0 +1,16 @@
+# extends: ../tspconfig.yaml                    # Extend another config file
+emit: # Emitter name
+  - "@typespec/openapi3"
+# options:                                      # Emitter options
+#   <emitter-name>:
+#    "<option-name>": "<option-value>"
+# environment-variables:                        # Environment variables which can be used to interpolate emitter options
+#   <variable-name>:
+#     default: "<variable-default>"
+# parameters:                                   # Parameters which can be used to interpolate emitter options
+#   <param-name>:
+#     default: "<param-default>"
+# trace:                                        # Trace areas to enable tracing
+#  - "<trace-name>"
+# warn-as-error: true                           # Treat warnings as errors
+# output-dir: "{project-root}/_generated"       # Configure the base output directory for all emitters