Merge pull request #1095 from jjlin/db-docs

Add more doc comments for MySQL/PostgreSQL connection URIs

.env.template

@@ -9,9 +9,16 @@
 
 ## Database URL
 ## When using SQLite, this is the path to the DB file, default to %DATA_FOLDER%/db.sqlite3
-## When using MySQL, this it is the URL to the DB, including username and password:
-## Format: mysql://[user[:password]@]host/database_name
 # DATABASE_URL=data/db.sqlite3
+## When using MySQL, specify an appropriate connection URI.
+## Details: https://docs.diesel.rs/diesel/mysql/struct.MysqlConnection.html
+# DATABASE_URL=mysql://user:password@host[:port]/database_name
+## When using PostgreSQL, specify an appropriate connection URI (recommended)
+## or keyword/value connection string.
+## Details:
+## - https://docs.diesel.rs/diesel/pg/struct.PgConnection.html
+## - https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-CONNSTRING
+# DATABASE_URL=postgresql://user:password@host[:port]/database_name
 
 ## Individual folders, these override %DATA_FOLDER%
 # RSA_KEY_FILENAME=data/rsa_key