change build for test servers, bump version to 0.3.1

.env.development

@@ -1,6 +1,7 @@
-# Only the variables that start with VUE_APP_ are seen in the application process.env in Vue.
 
-# this won't resolve as a URL on production; it's a URN only found in the test system
-VUE_APP_BVC_MEETUPS_PROJECT_CLAIM_ID=https://endorser.ch/entity/01HNTZYJJXTGT0EZS3VEJGX7AK
-VUE_APP_DEFAULT_ENDORSER_API_SERVER=http://localhost:3000
-VUE_APP_DEFAULT_IMAGE_API_SERVER=http://localhost:3002
+# I tried setting values here and using `vue-cli-service build --mode development`
+# but it didn't create some things in "dist":
+# - the "css" directory with the CSS extracted from Vue files
+# - the sw_scripts-combined* files
+#
+# ¯\_(ツ)_/¯