added custom 404 page for all books

documentation/dev-portal/book.toml

@@ -84,7 +84,7 @@ git-repository-icon = "fa-github"
 # edit-url-template = "https://github.com/rust-lang/mdBook/edit/master/guide/{path}"
 site-url = "/developers/"
 # cname = "nymtech.net"
-# input-404 = "not-found.md" # todo make custom 404 page
+input-404 = "not-found.md"
 
 [output.html.fold]
 enable = true    # whether or not to enable section folding

documentation/dev-portal/src/not-found.md

@@ -0,0 +1,11 @@
+# Page Not Found 
+
+You seem to have followed a link to a page that no longer exists. Our documentation is changing and growing over time, so this page has most likely been moved somewhere else. 
+
+For node setup guides, see the [Operator Guides book](https://nymtech.net/operators). 
+
+For information on network architecture traffic flow, clients, the SDKs, or interacting with the Nyx blockchain see the [Technical Documentation](https://nymtech.net/docs). 
+
+If you are looking for information on developer tutorials, app guides, and demo and community apps, check the sitemap on the left hand side of the screen. 
+
+If you still can't find what you're looking for get in touch with us via [Matrix](https://matrix.to/#/#nym-community:nymtech.chat). 

documentation/docs/src/not-found.md

@@ -2,10 +2,10 @@
 
 You seem to have followed a link to a page that no longer exists. Our documentation is changing and growing over time, so this page has most likely been moved somewhere else. 
 
-For node setup guides, see the [Operators Guides book](https://nymtech.net/operators). 
+For node setup guides, see the [Operator Guides book](https://nymtech.net/operators). 
 
 For developer tutorials, app guides, and demo and community apps, see the [Developer Portal](https://nymtech.net/developers). 
 
 If you are looking for information on network architecture traffic flow, clients, the SDKs, or interacting with the Nyx blockchain, check the sitemap on the left hand side of the screen. 
 
-If you still can't find what you're looking for get in touch with us via [Matrix](TODO). 
+If you still can't find what you're looking for get in touch with us via [Matrix](https://matrix.to/#/#nym-community:nymtech.chat). 

documentation/operators/book.toml

@@ -92,9 +92,9 @@ additional-js  = ["theme/pagetoc.js"]
 git-repository-url = "https://github.com/nymtech/nym"
 git-repository-icon = "fa-github"
 # edit-url-template = "https://github.com/rust-lang/mdBook/edit/master/guide/{path}"
-# site-url = "/docs/"
+site-url = "/operators/"
 # cname = "nymtech.net"
-# input-404 = "not-found.md" # todo make custom 404 page
+input-404 = "not-found.md"
 
 [output.html.fold]
 enable = true    # whether or not to enable section folding

documentation/operators/src/not-found.md

@@ -0,0 +1,11 @@
+# Page Not Found 
+
+You seem to have followed a link to a page that no longer exists. Our documentation is changing and growing over time, so this page has most likely been moved somewhere else. 
+
+For node setup guides, see the [Operator Guides book](https://nymtech.net/operators). 
+
+For developer tutorials, app guides, and demo and community apps, see the [Developer Portal](https://nymtech.net/developers). 
+
+If you are looking for information on setting up and maintaining infrastructure nodes, check the sitemap on the left hand side of the screen. 
+
+If you still can't find what you're looking for get in touch with us via [Matrix](https://matrix.to/#/#nym-community:nymtech.chat).