codebase: Remove web frontend and related services (#2067)

* codebase: Remove web frontend and related services

* refactor: Update StartPPROF to accept context and adjust related tests

* refactor: Simplify SetIfZero functions and update related tests

* config: Clarify DowngradeConfig method documentation regarding permanent removal of deprecated fields

* refactor: Rename setIfZeroAndWarn to setDefaultIfZeroWarn for clarity and update related calls

* refactor: Update error handling in DataHistoryManager and remove redundant error variable

cmd/documentation/README.md

@@ -76,7 +76,7 @@ upper := strings.ToUpper(testString)
 
 ## Donations
 
-<img src="https://github.com/thrasher-corp/gocryptotrader/blob/master/web/src/assets/donate.png?raw=true" hspace="70">
+<img src="/docs/assets/donate.png" hspace="70">
 
 If this framework helped you in any way, or you would like to support the developers working on it, please donate Bitcoin to:
 

cmd/documentation/engine_templates/apiserver.tmpl

@@ -1,26 +0,0 @@
-{{define "engine apiserver" -}}
-{{template "header" .}}
-## Current Features for {{.CapitalName}}
-+ The API server subsystem is a deprecated service used to host a REST or websocket server to interact with some functions of GoCryptoTrader
-+ This subsystem is no longer maintained and it is highly encouraged to interact with GRPC endpoints directly where possible
-+ In order to modify the behaviour of the API server subsystem, you can edit the following inside your config file:
-
-### deprecatedRPC
-
-| Config | Description | Example |
-| ------ | ----------- | ------- |
-| enabled | If enabled will create a REST server which will listen to commands on the listen address | `true` |
-| listenAddress | If enabled will listen for REST requests on this address and return a JSON response | `localhost:9050` |
-
-### websocketRPC
-
-| Config | Description | Example |
-| ------ | ----------- | ------- |
-| enabled | If enabled will create a REST server which will listen to commands on the listen address | `true` |
-| listenAddress | If enabled will listen for requests on this address and return a JSON response | `localhost:9051` |
-| connectionLimit | Defines how many connections the websocket RPC server can handle simultanesoly | `1` |
-| maxAuthFailures | For authenticated endpoints, the amount of failed attempts allowed before disconnection | `3` |
-| allowInsecureOrigin | Allows use of insecure connections | `true` |
-
-{{template "donations" .}}
-{{end}}

cmd/documentation/root_templates/root_readme.tmpl

@@ -74,7 +74,6 @@ However, we welcome pull requests for any exchange which does not match this cri
 + Scripting support. See [gctscript](/gctscript/README.md).
 + Recent and historic trade processing. See [trades](/exchanges/trade/README.md).
 + Backtesting application. An event-driven backtesting tool to test and iterate trading strategies using historical or custom data. See [backtester](/backtester/README.md).
-+ WebGUI (discontinued).
 + Exchange HTTP mock testing. See [mock](/exchanges/mock/README.md).
 + Exchange multichain deposits and withdrawals for specific exchanges. See [multichain transfer support](/docs/MULTICHAIN_TRANSFER_SUPPORT.md).
 

cmd/documentation/sub_templates/donations.tmpl

@@ -1,7 +1,7 @@
 {{define "donations" -}}
 ## Donations
 
-<img src="https://github.com/thrasher-corp/gocryptotrader/blob/master/web/src/assets/donate.png?raw=true" hspace="70">
+<img src="/docs/assets/donate.png" hspace="70">
 
 If this framework helped you in any way, or you would like to support the developers working on it, please donate Bitcoin to: