improve 404 page: add CHT branding, search and tips

[mrjones-plip]

Right now you get this when you end up on a 404 page:

404
This page could not be found.

As an end user, you:

• do not know if this is a CHT page
• have nothing to click on to get you back to content
• can't search for what you're looking for.

If possible, we should address this by making the 404 be like any other page, which would mean:

• there's the whole navigation to choose from on the left
• search is at the top
• there's CHT docs branding so you know which site you're on
• we should be sure the 404 header is still sent

Here's a quick and dirty mockup I did:

Good first issue

This ticket has the Good first issue label! This means it's been especially curated by other CHT contributors to be easy to work on for first time contributors per the docs.

To succeed on this ticket, please:

1. get the docs system installed locally - likely the easiest is to use docker to run hugo
2. add an the 404.html file in the layouts directory
3. put hugo template content in the new file based on docs and on the CleverCloud example

[andrablaj]

Example from CleverCloud we can easily adapt and reuse:

• CleverCloud (see code)

[mrjones-plip]

Thanks @andrablaj ! It looks like we just need to create the 404.html in the layouts directory per the docs. I think also this could be a good first issue. I'll spice it up!

[gmarav05]

Hello @andrablaj , @mrjones-plip. I am a new contributor to the medic community and I would like to work on this issue. Can you please assign me this issue?

[ayushman1210]

hey @mrjones-plip i would like to work on this please assign it to me thanks !!

[mrjones-plip]

Thanks for your interest in this ticket @gmarav05! As you have a number of other tickets in flight, I'm going to give this to another community member.

@qianchongyang - while I see you submitted a PR, there were other community members who had expressed interest in this issue before your PR was filed. I appreciate your effort that you put in, but I'm going to assign it to another community member. Please be sure to follow the process of having a ticket assigned to you before working on it to avoid this type of confusion in the future.

@ayushman1210 - I've assigned the ticket to you. While we didn't accept the PR to merge per above, you may be able to leverage the work that @qianchongyang did in their PR

[gmarav05]

No problem @mrjones-plip, yes you are right I am currently working on multiple issues in the cht-core repo. Once I Close them. Then I can pick other.