NodeJS : Intermittent 502 bad gateway error(using nginx,nodejs,mongodb)

NodeJS : Intermittent 502 bad gateway error(using nginx,nodejs,mongodb)
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

So here is a secret hidden feature I promissed to tell you.
This is a YouTube's feature which works on Desktop.
First, Ensure that the video is playing before proceeding.
Then, type the letters 'awesome' on the keyboard.
It will change your youtube progress bar into a flashing rainbow.

Allow me to introduce myself briefly,
Greetings, my name is Delphi.
Let me assist you in answering any questions you may have.
NodeJS : Intermittent 502 bad gateway error(using nginx,nodejs,mongodb)
I welcome your comments and chats if you have more detailed queries.
Your input is valuable, so please comment below if you have an answer or any insights to the answer.
Your answer will be recognized and appreciated with a 'heart' from me.
error(using 502 bad NodeJS nginx,nodejs,mongodb) gateway : Intermittent