chore(env): clarify definitions, include defaults

.env.template

@@ -1,3 +1,4 @@
+# This can be found in the email that reddit sent you when you created the app
 REDDIT_CLIENT_ID=""
 REDDIT_CLIENT_SECRET=""
 
@@ -5,15 +6,17 @@ REDDIT_USERNAME=""
 REDDIT_PASSWORD=""
 
 # Valid options are "yes" and "no"
+
+# Whether or not 2FA is enabled on the reddit account. Default: "no"
 REDDIT_2FA=""
 
-#If no, it will ask you a thread link to extract the thread, if yes it will randomize it.
-RANDOM_THREAD="yes"
+# If no, it will ask you a thread link to extract the thread, if yes it will randomize it. Default: "no"
+RANDOM_THREAD=""
 
-# Valid options are "light" and "dark"
+# Valid options are "light" and "dark". Default: "light"
 THEME=""
 
-# Enter a subreddit, e.g. "AskReddit"
+# Enter a subreddit, e.g. "AskReddit".
 SUBREDDIT=""
 
 # Filters the comments by range of lenght (min and max characters)
@@ -21,7 +24,7 @@ SUBREDDIT=""
 # DO NOT INSERT ANY SPACES BETWEEN THE COMMA AND THE VALUES
 COMMENT_LENGTH_RANGE = "min,max"
 
-# Range is 0 -> 1
+# Range is 0 -> 1. Default: "0.9"
 OPACITY="0.9"
 
 # The absolute path of the folder where you want to save the final video